diff --git a/Makefile b/Makefile
index c9d92a35c..477a3b3f7 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 run_options := $(filter-out $@,$(MAKECMDGOALS))
 
 .PHONY: all clean cleanassets test lint chromium opera firefox npm dig \
-	mv3-chromium mv3-firefox mv3-edge \
+	mv3-chromium mv3-firefox mv3-edge mv3-safari \
 	compare maxcost medcost mincost modifiers record wasm
 
 sources := $(wildcard assets/* assets/*/* dist/version src/* src/*/* src/*/*/* src/*/*/*/*)
@@ -80,6 +80,11 @@ dist/build/uBOLite.edge: tools/make-mv3.sh tools/make-edge.mjs $(sources) $(plat
 
 mv3-edge: dist/build/uBOLite.edge
 
+dist/build/uBOLite.safari: tools/make-mv3.sh $(sources) $(platform) $(mv3-data) dist/build/mv3-data
+	tools/make-mv3.sh safari
+
+mv3-safari: dist/build/uBOLite.safari
+
 dist/build/uAssets:
 	tools/pull-assets.sh
 
diff --git a/platform/mv3/extension/js/admin.js b/platform/mv3/extension/js/admin.js
index 843285d89..c9fa5f5b9 100644
--- a/platform/mv3/extension/js/admin.js
+++ b/platform/mv3/extension/js/admin.js
@@ -37,7 +37,7 @@ import {
 } from './mode-manager.js';
 
 import { broadcastMessage } from './utils.js';
-import { dnr } from './ext.js';
+import { dnr } from './ext-compat.js';
 import { registerInjectables } from './scripting-manager.js';
 import { rulesetConfig } from './config.js';
 import { ubolLog } from './debug.js';
diff --git a/platform/mv3/extension/js/background.js b/platform/mv3/extension/js/background.js
index 6499c9d5a..bc2ba932b 100644
--- a/platform/mv3/extension/js/background.js
+++ b/platform/mv3/extension/js/background.js
@@ -44,7 +44,6 @@ import {
 
 import {
     browser,
-    dnr,
     localRead, localRemove, localWrite,
     runtime,
     windows,
@@ -75,11 +74,12 @@ import {
     saveRulesetConfig,
 } from './config.js';
 
+import { dnr } from './ext-compat.js';
 import { registerInjectables } from './scripting-manager.js';
 
 /******************************************************************************/
 
-const UBOL_ORIGIN = runtime.getURL('').replace(/\/$/, '');
+const UBOL_ORIGIN = runtime.getURL('').replace(/\/$/, '').toLowerCase();
 
 const canShowBlockedCount = typeof dnr.setExtensionActionOptions === 'function';
 
@@ -205,7 +205,9 @@ function onMessage(request, sender, callback) {
 
     // https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/runtime/MessageSender
     //   Firefox API does not set `sender.origin`
-    if ( sender.origin !== undefined && sender.origin !== UBOL_ORIGIN ) { return; }
+    if ( sender.origin !== undefined ) {
+        if ( sender.origin.toLowerCase() !== UBOL_ORIGIN ) { return; }
+    }
 
     switch ( request.what ) {
 
diff --git a/platform/mv3/extension/js/debug.js b/platform/mv3/extension/js/debug.js
index 0a6ecaffe..ea5dafbed 100644
--- a/platform/mv3/extension/js/debug.js
+++ b/platform/mv3/extension/js/debug.js
@@ -19,11 +19,19 @@
     Home: https://github.com/gorhill/uBlock
 */
 
-import { dnr } from './ext.js';
+import { INITIATOR_DOMAINS, dnr } from './ext-compat.js';
+import { browser } from './ext.js';
 
 /******************************************************************************/
 
-export const isSideloaded = dnr.onRuleMatchedDebug instanceof Object;
+const isModern = dnr.onRuleMatchedDebug instanceof Object;
+
+export const isSideloaded = (( ) => {
+    if ( isModern ) { return true; }
+    if ( typeof dnr.getMatchedRules === 'function' ) { return true; }
+    const manifest = browser.runtime.getManifest();
+    return manifest.permissions?.includes('declarativeNetRequestFeedback') ?? false;
+})();
 
 /******************************************************************************/
 
@@ -67,8 +75,8 @@ const getRuleset = async rulesetId => {
             if ( condition.requestDomains ) {
                 condition.requestDomains = pruneLongLists(condition.requestDomains);
             }
-            if ( condition.initiatorDomains ) {
-                condition.initiatorDomains = pruneLongLists(condition.initiatorDomains);
+            if ( condition[INITIATOR_DOMAINS] ) {
+                condition[INITIATOR_DOMAINS] = pruneLongLists(condition[INITIATOR_DOMAINS]);
             }
         }
         const ruleId = rule.id;
@@ -92,20 +100,32 @@ export const getMatchedRules = (( ) => {
     const noopFn = ( ) => Promise.resolve([]);
     if ( isSideloaded !== true ) { return noopFn; }
 
-    return async tabId => {
-        const promises = [];
-        for ( let i = 0; i < bufferSize; i++ ) {
-            const j = (writePtr + i) % bufferSize;
-            const ruleInfo = matchedRules[j];
-            if ( ruleInfo === null ) { continue; }
-            if ( ruleInfo.request.tabId !== -1 ) {
-                if ( ruleInfo.request.tabId !== tabId ) { continue; }
+    if ( isModern ) {
+        return async tabId => {
+            const promises = [];
+            for ( let i = 0; i < bufferSize; i++ ) {
+                const j = (writePtr + i) % bufferSize;
+                const ruleInfo = matchedRules[j];
+                if ( ruleInfo === null ) { continue; }
+                if ( ruleInfo.request.tabId !== -1 ) {
+                    if ( ruleInfo.request.tabId !== tabId ) { continue; }
+                }
+                const promise = getRuleDetails(ruleInfo);
+                if ( promise === undefined ) { continue; }
+                promises.unshift(promise);
             }
-            const promise = getRuleDetails(ruleInfo);
-            if ( promise === undefined ) { continue; }
-            promises.unshift(promise);
+            return Promise.all(promises);
+        };
+    }
+
+    return async tabId => {
+        const matchedRules = await dnr.getMatchedRules({ tabId });
+        if ( matchedRules instanceof Object === false ) { return []; }
+        const out = [];
+        for ( const ruleInfo of matchedRules.rulesMatchedInfo ) {
+            out.push({ request: ruleInfo.request });
         }
-        return Promise.all(promises);
+        return out;
     };
 })();
 
@@ -118,6 +138,7 @@ const matchedRuleListener = ruleInfo => {
 
 export const toggleDeveloperMode = state => {
     if ( isSideloaded !== true ) { return; }
+    if ( isModern === false ) { return; } 
     if ( state ) {
         dnr.onRuleMatchedDebug.addListener(matchedRuleListener);
     } else {
diff --git a/platform/mv3/extension/js/ext-compat.js b/platform/mv3/extension/js/ext-compat.js
new file mode 100644
index 000000000..9e8469ce7
--- /dev/null
+++ b/platform/mv3/extension/js/ext-compat.js
@@ -0,0 +1,96 @@
+/*******************************************************************************
+
+    uBlock Origin Lite - a comprehensive, MV3-compliant content blocker
+    Copyright (C) 2022-present Raymond Hill
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see {http://www.gnu.org/licenses/}.
+
+    Home: https://github.com/gorhill/uBlock
+*/
+
+export const webext = self.browser || self.chrome;
+export const dnr = webext.declarativeNetRequest;
+export const INITIATOR_DOMAINS = 'initiatorDomains';
+export const EXCLUDED_INITIATOR_DOMAINS = 'excludedInitiatorDomains';
+
+/******************************************************************************/
+
+const ruleCompare = (a, b) => a.id - b.id;
+
+const isSameRules = (a, b) => {
+    a.sort(ruleCompare);
+    b.sort(ruleCompare);
+    return JSON.stringify(a) === JSON.stringify(b);
+};
+
+/******************************************************************************/
+
+dnr.setAllowAllRules = async function(id, allowed, notAllowed, reverse) {
+    const [
+        beforeDynamicRules,
+        beforeSessionRules,
+    ] = await Promise.all([
+        dnr.getDynamicRules({ ruleIds: [ id+0 ] }),
+        dnr.getSessionRules({ ruleIds: [ id+1 ] }),
+    ]);
+    const addDynamicRules = [];
+    const addSessionRules = [];
+    if ( reverse || allowed.length || notAllowed.length ) {
+        const rule0 = {
+            id: id+0,
+            action: { type: 'allowAllRequests' },
+            condition: {
+                resourceTypes: [ 'main_frame' ],
+            },
+            priority: 1000000,
+        };
+        if ( allowed.length ) {
+            rule0.condition.requestDomains = allowed.slice();
+        } else if ( notAllowed.length ) {
+            rule0.condition.excludedRequestDomains = notAllowed.slice();
+        }
+        addDynamicRules.push(rule0);
+        // https://github.com/uBlockOrigin/uBOL-home/issues/114
+        // https://github.com/uBlockOrigin/uBOL-home/issues/247
+        const rule1 = {
+            id: id+1,
+            action: { type: 'allow' },
+            condition: {
+                tabIds: [ webext.tabs.TAB_ID_NONE ],
+            },
+            priority: 1000000,
+        };
+        if ( allowed.length ) {
+            rule1.condition.initiatorDomains = allowed.slice();
+        } else if ( notAllowed.length ) {
+            rule1.condition.excludedInitiatorDomains = notAllowed.slice();
+        }
+        addSessionRules.push(rule1);
+    }
+    if ( isSameRules(addDynamicRules, beforeDynamicRules) ) { return false; }
+    return Promise.all([
+        dnr.updateDynamicRules({
+            addRules: addDynamicRules,
+            removeRuleIds: beforeDynamicRules.map(r => r.id),
+        }),
+        dnr.updateSessionRules({
+            addRules: addSessionRules,
+            removeRuleIds: beforeSessionRules.map(r => r.id),
+        }),
+    ]).then(( ) =>
+        true
+    ).catch(( ) =>
+        false
+    );
+};
diff --git a/platform/mv3/extension/js/ext.js b/platform/mv3/extension/js/ext.js
index 2f3285388..ee735b21b 100644
--- a/platform/mv3/extension/js/ext.js
+++ b/platform/mv3/extension/js/ext.js
@@ -19,16 +19,13 @@
     Home: https://github.com/gorhill/uBlock
 */
 
-export const browser =
-    self.browser instanceof Object &&
-    self.browser instanceof Element === false
-        ? self.browser
-        : self.chrome;
+import { webext } from './ext-compat.js';
 
-export const dnr = browser.declarativeNetRequest;
+/******************************************************************************/
+
+export const browser = webext;
 export const i18n = browser.i18n;
 export const runtime = browser.runtime;
-export const TAB_ID_NONE = browser.tabs.TAB_ID_NONE;
 export const windows = browser.windows;
 
 /******************************************************************************/
diff --git a/platform/mv3/extension/js/popup.js b/platform/mv3/extension/js/popup.js
index a50c889b6..2cb89045b 100644
--- a/platform/mv3/extension/js/popup.js
+++ b/platform/mv3/extension/js/popup.js
@@ -347,6 +347,7 @@ async function init() {
         }
         tabURL.href = url.href || '';
     } catch {
+        return false;
     }
 
     if ( url !== undefined ) {
diff --git a/platform/mv3/extension/js/report.js b/platform/mv3/extension/js/report.js
index 1350edcd4..eda30f97f 100644
--- a/platform/mv3/extension/js/report.js
+++ b/platform/mv3/extension/js/report.js
@@ -19,8 +19,9 @@
     Home: https://github.com/gorhill/uBlock
 */
 
-import { dnr, runtime } from './ext.js';
 import { dom, qs$ } from './dom.js';
+import { dnr } from './ext-compat.js';
+import { runtime } from './ext.js';
 import { sendMessage } from './ext.js';
 
 /******************************************************************************/
diff --git a/platform/mv3/extension/js/ruleset-manager.js b/platform/mv3/extension/js/ruleset-manager.js
index add3c5e25..ae5ef7f32 100644
--- a/platform/mv3/extension/js/ruleset-manager.js
+++ b/platform/mv3/extension/js/ruleset-manager.js
@@ -20,8 +20,6 @@
 */
 
 import {
-    TAB_ID_NONE,
-    dnr,
     i18n,
     localRead, localRemove, localWrite,
     runtime,
@@ -33,6 +31,7 @@ import {
     saveRulesetConfig,
 } from './config.js';
 
+import { dnr } from './ext-compat.js';
 import { fetchJSON } from './fetch.js';
 import { getAdminRulesets } from './admin.js';
 import { hasBroadHostPermissions } from './utils.js';
@@ -440,124 +439,30 @@ async function updateSessionRules() {
 /******************************************************************************/
 
 async function filteringModesToDNR(modes) {
-    const [
-        dynamicRules,
-        sessionRules,
-    ] = await Promise.all([
-        dnr.getDynamicRules({ ruleIds: [ TRUSTED_DIRECTIVE_BASE_RULE_ID+0 ] }),
-        dnr.getSessionRules({ ruleIds: [ TRUSTED_DIRECTIVE_BASE_RULE_ID+1 ] }),
-    ]);
-    const dynamicRule = dynamicRules?.length && dynamicRules[0] || undefined;
-    const beforeRequestDomainSet = new Set(dynamicRule?.condition.requestDomains);
-    const beforeExcludedRrequestDomainSet = new Set(dynamicRule?.condition.excludedRequestDomains);
-    if ( dynamicRule !== undefined && beforeRequestDomainSet.size === 0 ) {
-        beforeRequestDomainSet.add('all-urls');
-    } else {
-        beforeExcludedRrequestDomainSet.add('all-urls');
-    }
-
     const noneHostnames = new Set([ ...modes.none ]);
     const notNoneHostnames = new Set([ ...modes.basic, ...modes.optimal, ...modes.complete ]);
-    let afterRequestDomainSet = new Set();
-    let afterExcludedRequestDomainSet = new Set();
-    if ( noneHostnames.has('all-urls') ) {
-        afterRequestDomainSet = new Set([ 'all-urls' ]);
-        afterExcludedRequestDomainSet = notNoneHostnames;
+    const requestDomains = [];
+    const excludedRequestDomains = [];
+    const allowEverywhere = noneHostnames.has('all-urls');
+    if ( allowEverywhere ) {
+        excludedRequestDomains.push(...notNoneHostnames);
     } else {
-        afterRequestDomainSet = noneHostnames;
-        afterExcludedRequestDomainSet = new Set();
+        requestDomains.push(...noneHostnames);
     }
-
-    const removeDynamicRuleIds = [];
-    const removeSessionRuleIds = [];
-    if ( dynamicRule ) {
-        removeDynamicRuleIds.push(TRUSTED_DIRECTIVE_BASE_RULE_ID+0);
-        removeSessionRuleIds.push(TRUSTED_DIRECTIVE_BASE_RULE_ID+1);
-    }
-
-    const allowEverywhere = afterRequestDomainSet.delete('all-urls');
-    const addDynamicRules = [];
-    const addSessionRules = [];
-    if (
-        allowEverywhere ||
-        afterRequestDomainSet.size !== 0 ||
-        afterExcludedRequestDomainSet.size !== 0
-    ) {
-        const rule0 = {
-            id: TRUSTED_DIRECTIVE_BASE_RULE_ID+0,
-            action: { type: 'allowAllRequests' },
-            condition: {
-                resourceTypes: [ 'main_frame' ],
-            },
-            priority: 100,
-        };
-        if ( afterRequestDomainSet.size !== 0 ) {
-            rule0.condition.requestDomains =
-                Array.from(afterRequestDomainSet).sort();
-        } else if ( afterExcludedRequestDomainSet.size !== 0 ) {
-            rule0.condition.excludedRequestDomains =
-                Array.from(afterExcludedRequestDomainSet).sort();
-        }
-        addDynamicRules.push(rule0);
-        // https://github.com/uBlockOrigin/uBOL-home/issues/114
-        // https://github.com/uBlockOrigin/uBOL-home/issues/247
-        const rule1 = {
-            id: TRUSTED_DIRECTIVE_BASE_RULE_ID+1,
-            action: { type: 'allow' },
-            condition: {
-                tabIds: [ TAB_ID_NONE ],
-            },
-            priority: 100,
-        };
-        if ( rule0.condition.requestDomains ) {
-            rule1.condition.initiatorDomains =
-                rule0.condition.requestDomains.slice();
-        } else if ( rule0.condition.excludedRequestDomains ) {
-            rule1.condition.excludedInitiatorDomains =
-                rule0.condition.excludedRequestDomains.slice();
-        }
-        addSessionRules.push(rule1);
-    }
-
-    const noneCount = noneHostnames.has('all-urls')
-        ? -notNoneHostnames.size
+    const noneCount = allowEverywhere
+        ? notNoneHostnames.size
         : noneHostnames.size;
-
-    const promises = [];
-    if ( isDifferentAllowRules(addDynamicRules, dynamicRules) ) {
-        promises.push(dnr.updateDynamicRules({
-            addRules: addDynamicRules,
-            removeRuleIds: removeDynamicRuleIds,
-        }));
-        ubolLog(`Add "allowAllRequests" dynamic rule for ${noneCount} sites`);
-    }
-    if ( isDifferentAllowRules(addSessionRules, sessionRules) ) {
-        promises.push(dnr.updateSessionRules({
-            addRules: addSessionRules,
-            removeRuleIds: removeSessionRuleIds,
-        }));
-        ubolLog(`Add "allow" session rule for ${noneCount} sites`);
-    }
-    if ( promises.length === 0 ) { return; }
-    return Promise.all(promises);
+    return dnr.setAllowAllRules(
+        TRUSTED_DIRECTIVE_BASE_RULE_ID,
+        requestDomains.sort(),
+        excludedRequestDomains.sort(),
+        allowEverywhere
+    ).then(modified => {
+        if ( modified === false ) { return; }
+        ubolLog(`${allowEverywhere ? 'Enabled' : 'Disabled'} DNR filtering for ${noneCount} sites`);
+    });
 }
 
-const isDifferentAllowRules = (a = [], b = []) => {
-    if ( a.length !== b.length ) { return true; }
-    const pp = [
-        'requestDomains',
-        'excludedRequestDomains',
-        'initiatorDomains',
-        'excludedInitiatorDomains',
-    ];
-    for ( const p of pp ) {
-        const ac = a.length && a[0].condition[p] || [];
-        const bc = b.length && b[0].condition[p] || [];
-        if ( ac.join() !== bc.join() ) { return true; }
-    }
-    return false;
-};
-
 /******************************************************************************/
 
 async function defaultRulesetsFromLanguage() {
diff --git a/platform/mv3/extension/js/scripting-manager.js b/platform/mv3/extension/js/scripting-manager.js
index e22a7c530..8ff9a5c36 100644
--- a/platform/mv3/extension/js/scripting-manager.js
+++ b/platform/mv3/extension/js/scripting-manager.js
@@ -68,7 +68,9 @@ const arrayEq = (a = [], b = [], sort = true) => {
 
 const normalizeMatches = matches => {
     if ( matches.length <= 1 ) { return; }
-    if ( matches.includes('<all_urls>') === false ) { return; }
+    if ( matches.includes('<all_urls>') === false ) {
+        if ( matches.includes('*://*/*') === false ) { return; }
+    }
     matches.length = 0;
     matches.push('<all_urls>');
 };
@@ -555,6 +557,9 @@ function registerScriptlet(context, scriptletDetails) {
 
 /******************************************************************************/
 
+// Issue: Safari appears to completely ignore excludeMatches
+// https://github.com/radiolondra/ExcludeMatches-Test
+
 async function registerInjectables() {
     if ( browser.scripting === undefined ) { return false; }
 
diff --git a/platform/mv3/extension/js/scripting/zapper.js b/platform/mv3/extension/js/scripting/zapper.js
index fb37ee1cf..5a0e81c58 100644
--- a/platform/mv3/extension/js/scripting/zapper.js
+++ b/platform/mv3/extension/js/scripting/zapper.js
@@ -28,11 +28,13 @@ const zapper = self.uBOLZapper = self.uBOLZapper || {};
 if ( zapper.injected ) { return; }
 zapper.injected = true;
 
+const webext = typeof browser === 'object' ? browser : chrome;
+
 /******************************************************************************/
 
 const sendMessage = msg => {
     try {
-        chrome.runtime.sendMessage(msg).catch(( ) => { });
+        webext.runtime.sendMessage(msg).catch(( ) => { });
     } catch {
     }
 };
@@ -365,11 +367,10 @@ const onFrameMessage = function(msg) {
 // can remove the iframe.
 
 const bootstrap = async ( ) => {
-    const dynamicURL = new URL(chrome.runtime.getURL('/zapper-ui.html'));
+    const dynamicURL = new URL(webext.runtime.getURL('/zapper-ui.html'));
     return new Promise(resolve => {
         const frame = document.createElement('iframe');
         frame.setAttribute(zapperSecret, '');
-        document.documentElement.append(frame);
         frame.onload = ( ) => {
             frame.onload = null;
             frame.setAttribute(`${zapperSecret}-loaded`, '');
@@ -382,7 +383,7 @@ const bootstrap = async ( ) => {
                 quitZapper();
             };
             const realURL = new URL(dynamicURL);
-            realURL.hostname = chrome.i18n.getMessage('@@extension_id');
+            realURL.hostname = webext.i18n.getMessage('@@extension_id');
             frame.contentWindow.postMessage(
                 { what: 'zapperStart' },
                 realURL.origin,
@@ -394,7 +395,13 @@ const bootstrap = async ( ) => {
                 zapperFramePort: port,
             });
         };
-        frame.contentWindow.location = dynamicURL.href;
+        if ( dynamicURL.protocol !== 'safari-web-extension:' ) {
+            document.documentElement.append(frame);
+            frame.contentWindow.location = dynamicURL.href;
+        } else {
+            frame.setAttribute('src', dynamicURL.href);
+            document.documentElement.append(frame);
+        }
     });
 };
 
diff --git a/platform/mv3/extension/js/utils.js b/platform/mv3/extension/js/utils.js
index ff96e9ee6..00451f15f 100644
--- a/platform/mv3/extension/js/utils.js
+++ b/platform/mv3/extension/js/utils.js
@@ -116,7 +116,7 @@ const matchesFromHostnames = hostnames => {
 const hostnamesFromMatches = origins => {
     const out = [];
     for ( const origin of origins ) {
-        if ( origin === '<all_urls>' ) {
+        if ( origin === '<all_urls>' || origin === '*://*/*' ) {
             out.push('all-urls');
             continue;
         }
@@ -141,7 +141,10 @@ const broadcastMessage = message => {
 // most browsers treat host_permissions as optional."
 
 async function hasBroadHostPermissions() {
-    return browser.permissions.contains({ origins: [ '<all_urls>' ] });
+    return browser.permissions.getAll().then(permissions =>
+        permissions.origins.includes('<all_urls>') ||
+        permissions.origins.includes('*://*/*')
+    ).catch(( ) => false);
 }
 
 /******************************************************************************/
diff --git a/platform/mv3/make-rulesets.js b/platform/mv3/make-rulesets.js
index 930aa99b7..b69e27a59 100644
--- a/platform/mv3/make-rulesets.js
+++ b/platform/mv3/make-rulesets.js
@@ -71,7 +71,7 @@ const env = [
     'user_stylesheet',
 ];
 
-if ( platform === 'edge' ) {
+if ( platform === 'edge' || platform === 'safari' ) {
     env.push('chromium');
 }
 
@@ -318,6 +318,38 @@ const isURLSkip = rule =>
 
 /******************************************************************************/
 
+function patchRuleset(ruleset) {
+    if ( platform !== 'safari' ) { return ruleset; }
+    const out = [];
+    for ( const rule of ruleset ) {
+        const condition = rule.condition;
+        if ( rule.action.type === 'modifyHeaders' ) {
+            log(`Safari's incomplete API: ${JSON.stringify(rule)}`, true);
+            continue;
+        }
+        if ( Array.isArray(condition.requestMethods) ) {
+            log(`Safari's incomplete API: ${JSON.stringify(rule)}`, true);
+            continue;
+        }
+        if ( Array.isArray(condition.excludedRequestMethods) ) {
+            log(`Safari's incomplete API: ${JSON.stringify(rule)}`, true);
+            continue;
+        }
+        if ( Array.isArray(condition.initiatorDomains) ) {
+            condition.domains = condition.initiatorDomains;
+            delete condition.initiatorDomains;
+        }
+        if ( Array.isArray(condition.excludedInitiatorDomains) ) {
+            condition.excludedDomains = condition.excludedInitiatorDomains;
+            delete condition.excludedInitiatorDomains;
+        }
+        out.push(rule);
+    }
+    return out;
+}
+
+/******************************************************************************/
+
 // Two distinct hostnames:
 //   www.example.com
 //   example.com
@@ -489,7 +521,9 @@ async function processNetworkFilters(assetDetails, network) {
         }
     }
 
-    const plainGood = rules.filter(rule => isSafe(rule) && isRegex(rule) === false);
+    const plainGood = patchRuleset(
+        rules.filter(rule => isSafe(rule) && isRegex(rule) === false)
+    );
     log(`\tPlain good: ${plainGood.length}`);
     log(plainGood
         .filter(rule => Array.isArray(rule._warning))
@@ -497,12 +531,16 @@ async function processNetworkFilters(assetDetails, network) {
         .join('\n'), true
     );
 
-    const regexes = rules.filter(rule => isSafe(rule) && isRegex(rule));
+    const regexes = patchRuleset(
+        rules.filter(rule => isSafe(rule) && isRegex(rule))
+    );
     log(`\tMaybe good (regexes): ${regexes.length}`);
 
-    const redirects = rules.filter(rule =>
-        isUnsupported(rule) === false &&
-        isRedirect(rule)
+    const redirects = patchRuleset(
+        rules.filter(rule =>
+            isUnsupported(rule) === false &&
+            isRedirect(rule)
+        )
     );
     redirects.forEach(rule => {
         if ( rule.action.redirect.extensionPath === undefined ) { return; }
@@ -512,17 +550,23 @@ async function processNetworkFilters(assetDetails, network) {
     });
     log(`\tredirect=: ${redirects.length}`);
 
-    const removeparamsGood = rules.filter(rule =>
-        isUnsupported(rule) === false && isRemoveparam(rule)
+    const removeparamsGood = patchRuleset(
+        rules.filter(rule =>
+            isUnsupported(rule) === false && isRemoveparam(rule)
+        )
     );
-    const removeparamsBad = rules.filter(rule =>
-        isUnsupported(rule) && isRemoveparam(rule)
+    const removeparamsBad = patchRuleset(
+        rules.filter(rule =>
+            isUnsupported(rule) && isRemoveparam(rule)
+        )
     );
     log(`\tremoveparams= (accepted/discarded): ${removeparamsGood.length}/${removeparamsBad.length}`);
 
-    const modifyHeaders = rules.filter(rule =>
-        isUnsupported(rule) === false &&
-        isModifyHeaders(rule)
+    const modifyHeaders = patchRuleset(
+        rules.filter(rule =>
+            isUnsupported(rule) === false &&
+            isModifyHeaders(rule)
+        )
     );
     log(`\tmodifyHeaders=: ${modifyHeaders.length}`);
 
@@ -1401,10 +1445,10 @@ async function main() {
     // Patch web_accessible_resources key
     manifest.web_accessible_resources = manifest.web_accessible_resources || [];
     const web_accessible_resources = {
-        resources: Array.from(requiredRedirectResources).map(path => `/${path}`),
+        resources: Array.from(requiredRedirectResources).map(path => `${path}`),
         matches: [ '<all_urls>' ],
     };
-    if ( env.includes('chromium') ) {
+    if ( env.includes('chromium') && env.includes('safari') === false ) {
         web_accessible_resources.use_dynamic_url = true;
     }
     manifest.web_accessible_resources.push(web_accessible_resources);
diff --git a/platform/mv3/safari/ext-compat.js b/platform/mv3/safari/ext-compat.js
new file mode 100644
index 000000000..c7f02984d
--- /dev/null
+++ b/platform/mv3/safari/ext-compat.js
@@ -0,0 +1,131 @@
+/*******************************************************************************
+
+    uBlock Origin Lite - a comprehensive, MV3-compliant content blocker
+    Copyright (C) 2022-present Raymond Hill
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see {http://www.gnu.org/licenses/}.
+
+    Home: https://github.com/gorhill/uBlock
+*/
+
+
+export const webext = self.browser;
+export const INITIATOR_DOMAINS = 'domains';
+export const EXCLUDED_INITIATOR_DOMAINS = 'excludedDomains';
+
+/******************************************************************************/
+
+// https://developer.mozilla.org/docs/Mozilla/Add-ons/WebExtensions/API/declarativeNetRequest/
+
+const nativeDNR = webext.declarativeNetRequest;
+
+const isSupportedRule = r => {
+    if ( r.action?.responseHeaders ) { return false; }
+    if ( r.condition?.tabIds !== undefined ) { return false; }
+    return true;
+};
+
+const ruleCompare = (a, b) => a.id - b.id;
+
+const isSameRules = (a, b) => {
+    a.sort(ruleCompare);
+    b.sort(ruleCompare);
+    return JSON.stringify(a) === JSON.stringify(b);
+};
+
+/******************************************************************************/
+
+export const dnr = {
+    DYNAMIC_RULESET_ID: '_dynamic',
+    MAX_NUMBER_OF_ENABLED_STATIC_RULESETS: nativeDNR.MAX_NUMBER_OF_ENABLED_STATIC_RULESETS,
+    MAX_NUMBER_OF_REGEX_RULES: nativeDNR.MAX_NUMBER_OF_DYNAMIC_AND_SESSION_RULES,
+    async getAvailableStaticRuleCount() {
+        return 150000;
+    },
+    getDynamicRules({ ruleIds } = {}) {
+        return new Promise(resolve => {
+            nativeDNR.getDynamicRules(rules => {
+                if ( Array.isArray(rules) === false ) { return resolve([]); }
+                if ( Array.isArray(ruleIds) === false ) { return resolve(rules); }
+                return resolve(rules.filter(rule => ruleIds.includes(rule.id)));
+            });
+        });
+    },
+    getEnabledRulesets(...args) {
+        return nativeDNR.getEnabledRulesets(...args);
+    },
+    getMatchedRules(...args) {
+        return nativeDNR.getMatchedRules(...args);
+    },
+    getSessionRules({ ruleIds } = {}) {
+        return new Promise(resolve => {
+            nativeDNR.getSessionRules(rules => {
+                if ( Array.isArray(rules) === false ) { return resolve([]); }
+                if ( Array.isArray(ruleIds) === false ) { return resolve(rules); }
+                return resolve(rules.filter(rule => ruleIds.includes(rule.id)));
+            });
+        });
+    },
+    isRegexSupported(...args) {
+        return nativeDNR.isRegexSupported(...args);
+    },
+    async updateDynamicRules(optionsBefore) {
+        const { addRules, removeRuleIds } = optionsBefore;
+        const addRulesAfter = addRules?.filter(isSupportedRule);
+        if ( Boolean(addRulesAfter?.length || removeRuleIds?.length) === false ) { return; }
+        const optionsAfter = {};
+        if ( addRulesAfter?.length ) { optionsAfter.addRules = addRulesAfter; }
+        if ( removeRuleIds?.length ) { optionsAfter.removeRuleIds = removeRuleIds; }
+        return nativeDNR.updateDynamicRules(optionsAfter);
+    },
+    updateEnabledRulesets(...args) {
+        return nativeDNR.updateEnabledRulesets(...args);
+    },
+    async updateSessionRules(optionsBefore) {
+        const { addRules, removeRuleIds } = optionsBefore;
+        const addRulesAfter = addRules?.filter(isSupportedRule);
+        if ( Boolean(addRulesAfter?.length || removeRuleIds?.length) === false ) { return; }
+        const optionsAfter = {};
+        if ( optionsAfter?.length ) { optionsAfter.addRules = addRulesAfter; }
+        if ( removeRuleIds?.length ) { optionsAfter.removeRuleIds = removeRuleIds; }
+        return nativeDNR.updateSessionRules(optionsAfter);
+    },
+    async setAllowAllRules(id, allowed, notAllowed, reverse) {
+        const beforeRules = await this.getDynamicRules({ ruleIds: [ id+0 ] });
+        const addRules = [];
+        if ( reverse || allowed.length || notAllowed.length ) {
+            const rule0 = {
+                id: id+0,
+                action: { type: 'allow' },
+                condition: { urlFilter: '*' },
+                priority: 1000000,
+            };
+            if ( allowed.length ) {
+                rule0.condition.domains = allowed;
+            } else if ( notAllowed.length ) {
+                rule0.condition.excludedDomains = notAllowed;
+            }
+            addRules.push(rule0);
+        }
+        if ( isSameRules(addRules, beforeRules) ) { return false; }
+        return this.updateDynamicRules({
+            addRules,
+            removeRuleIds: beforeRules.map(r => r.id),
+        }).then(( ) =>
+            true
+        ).catch(( ) =>
+            false
+        );
+    },
+};
diff --git a/platform/mv3/safari/manifest.json b/platform/mv3/safari/manifest.json
new file mode 100644
index 000000000..ba7cc7715
--- /dev/null
+++ b/platform/mv3/safari/manifest.json
@@ -0,0 +1,64 @@
+{
+  "action": {
+    "default_icon": "/img/icon_64.png",
+    "default_popup": "popup.html"
+  },
+  "author": "Raymond Hill",
+  "background": {
+    "scripts": [ "/js/background.js" ],
+    "type": "module"
+  },
+  "commands": {
+    "enter-zapper-mode": {
+      "description": "__MSG_zapperTipEnter__"
+    }
+  },
+  "declarative_net_request": {
+    "rule_resources": [
+    ]
+  },
+  "default_locale": "en",
+  "description": "__MSG_extShortDesc__",
+  "icons": {
+    "16": "/img/icon_16.png",
+    "32": "/img/icon_32.png",
+    "64": "/img/icon_64.png",
+    "128": "/img/icon_128.png",
+    "512": "/img/icon_512.png"
+  },
+  "manifest_version": 3,
+  "name": "__MSG_extName__",
+  "options_ui": {
+    "page": "dashboard.html"
+  },
+  "host_permissions": [
+    "<all_urls>"
+  ],
+  "permissions": [
+    "activeTab",
+    "declarativeNetRequest",
+    "declarativeNetRequestWithHostAccess",
+    "scripting",
+    "storage"
+  ],
+  "short_name": "uBO Lite",
+  "version": "1.0",
+  "web_accessible_resources": [
+    {
+      "resources": [
+        "strictblock.html"
+      ],
+      "matches": [
+        "<all_urls>"
+      ]
+    },
+    {
+      "resources": [
+        "zapper-ui.html"
+      ],
+      "matches": [
+        "<all_urls>"
+      ]
+    }
+  ]
+}
diff --git a/src/js/static-dnr-filtering.js b/src/js/static-dnr-filtering.js
index df23d863c..6da12ae45 100644
--- a/src/js/static-dnr-filtering.js
+++ b/src/js/static-dnr-filtering.js
@@ -437,6 +437,20 @@ function finalizeRuleset(context, network) {
     mergeRules(rulesetMap, 'requestDomains');
     mergeRules(rulesetMap, 'responseHeaders');
 
+    // Convert back single-entry requestDomains into pattern-based filters
+    // https://github.com/uBlockOrigin/uBOL-home/issues/327
+    // TODO: Remove when (if) Safari is changed to interpret requestDomains as
+    //       in other browsers.
+    for ( const rule of rulesetMap.values() ) {
+        const { condition } = rule;
+        if ( condition?.requestDomains === undefined ) { continue; }
+        if ( condition.requestDomains.length !== 1 ) { continue; }
+        if ( condition.urlFilter !== undefined ) { continue; }
+        if ( condition.regexFilter !== undefined ) { continue; }
+        condition.urlFilter = `||${condition.requestDomains[0]}^`;
+        condition.requestDomains = undefined;
+    }
+
     // Patch id
     const rulesetFinal = [];
     {
diff --git a/tools/make-mv3.sh b/tools/make-mv3.sh
index 6d2364930..7a9988433 100755
--- a/tools/make-mv3.sh
+++ b/tools/make-mv3.sh
@@ -23,6 +23,9 @@ for i in "$@"; do
     edge)
       PLATFORM="edge"
       ;;
+    safari)
+      PLATFORM="safari"
+      ;;
     uBOLite_+([0-9]).+([0-9]).+([0-9]).+([0-9]))
       TAGNAME="$i"
       FULL="yes"
@@ -82,13 +85,12 @@ cp -R "$UBO_DIR/src/img/flags-of-the-world" "$DES"/img
 cp LICENSE.txt "$DES"/
 
 echo "*** uBOLite.mv3: Copying mv3-specific files"
-if [ "$PLATFORM" = "firefox" ]; then
-    cp platform/mv3/firefox/background.html "$DES"/
-fi
+cp platform/mv3/"$PLATFORM"/manifest.json "$DES"/
 cp platform/mv3/extension/*.html "$DES"/
 cp platform/mv3/extension/*.json "$DES"/
 cp platform/mv3/extension/css/* "$DES"/css/
 cp -R platform/mv3/extension/js/* "$DES"/js/
+cp platform/mv3/"$PLATFORM"/ext-compat.js "$DES"/js/ 2>/dev/null || :
 cp platform/mv3/extension/img/* "$DES"/img/
 cp -R platform/mv3/extension/_locales "$DES"/
 cp platform/mv3/README.md "$DES/"
@@ -96,11 +98,6 @@ cp platform/mv3/README.md "$DES/"
 echo "*** uBOLite.mv3: Generating rulesets"
 TMPDIR=$(mktemp -d)
 mkdir -p "$TMPDIR"
-if [ "$PLATFORM" = "chromium" ] || [ "$PLATFORM" = "edge" ]; then
-    cp platform/mv3/chromium/manifest.json "$DES"/
-elif [ "$PLATFORM" = "firefox" ]; then
-    cp platform/mv3/firefox/manifest.json "$DES"/
-fi
 ./tools/make-nodejs.sh "$TMPDIR"
 cp platform/mv3/*.json "$TMPDIR"/
 cp platform/mv3/*.js "$TMPDIR"/