diff --git a/platform/mv3/extension/js/scripting-manager.js b/platform/mv3/extension/js/scripting-manager.js
index 17bd5ac8d..c7c9773d6 100644
--- a/platform/mv3/extension/js/scripting-manager.js
+++ b/platform/mv3/extension/js/scripting-manager.js
@@ -354,70 +354,6 @@ function registerProcedural(context) {
 
 /******************************************************************************/
 
-function registerDeclarative(context) {
-    const { before, filteringModeDetails, rulesetsDetails } = context;
-
-    const js = [];
-    for ( const rulesetDetails of rulesetsDetails ) {
-        const count = rulesetDetails.css?.declarative || 0;
-        if ( count === 0 ) { continue; }
-        js.push(`/rulesets/scripting/declarative/${rulesetDetails.id}.js`);
-    }
-    if ( js.length === 0 ) { return; }
-
-    const { none, basic, optimal, complete } = filteringModeDetails;
-    const matches = [
-        ...ut.matchesFromHostnames(optimal),
-        ...ut.matchesFromHostnames(complete),
-    ];
-    if ( matches.length === 0 ) { return; }
-
-    normalizeMatches(matches);
-
-    js.unshift('/js/scripting/isolated-api.js');
-    js.push('/js/scripting/css-declarative.js');
-
-    const excludeMatches = [];
-    if ( none.has('all-urls') === false ) {
-        excludeMatches.push(...ut.matchesFromHostnames(none));
-    }
-    if ( basic.has('all-urls') === false ) {
-        excludeMatches.push(...ut.matchesFromHostnames(basic));
-    }
-
-    const registered = before.get('css-declarative');
-    before.delete('css-declarative'); // Important!
-
-    const directive = {
-        id: 'css-declarative',
-        js,
-        matches,
-        allFrames: true,
-        runAt: 'document_start',
-    };
-    if ( excludeMatches.length !== 0 ) {
-        directive.excludeMatches = excludeMatches;
-    }
-
-    // register
-    if ( registered === undefined ) {
-        context.toAdd.push(directive);
-        return;
-    }
-
-    // update
-    if (
-        ut.strArrayEq(registered.js, js, false) === false ||
-        ut.strArrayEq(registered.matches, matches) === false ||
-        ut.strArrayEq(registered.excludeMatches, excludeMatches) === false
-    ) {
-        context.toRemove.push('css-declarative');
-        context.toAdd.push(directive);
-    }
-}
-
-/******************************************************************************/
-
 function registerSpecific(context) {
     const { before, filteringModeDetails, rulesetsDetails } = context;
 
@@ -602,7 +538,6 @@ async function registerInjectables() {
     };
 
     await Promise.all([
-        registerDeclarative(context),
         registerProcedural(context),
         registerScriptlet(context, scriptletDetails),
         registerSpecific(context),
diff --git a/platform/mv3/extension/js/scripting/css-declarative.js b/platform/mv3/extension/js/scripting/css-declarative.js
deleted file mode 100644
index a0364ce20..000000000
--- a/platform/mv3/extension/js/scripting/css-declarative.js
+++ /dev/null
@@ -1,116 +0,0 @@
-/*******************************************************************************
-
-    uBlock Origin Lite - a comprehensive, MV3-compliant content blocker
-    Copyright (C) 2014-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
-*/
-
-// Important!
-// Isolate from global scope
-(function uBOL_cssDeclarative() {
-
-/******************************************************************************/
-
-const declarativeImports = self.declarativeImports || [];
-self.declarativeImports = undefined;
-
-/******************************************************************************/
-
-const selectors = [];
-const exceptions = [];
-
-const lookupHostname = (hostname, details, out) => {
-    let seqi = details.hostnamesMap.get(hostname);
-    if ( seqi === undefined ) { return; }
-    const { argsList, argsSeqs } = details;
-    for (;;) {
-        const argi = argsSeqs[seqi++];
-        const done = argi > 0;
-        out.push(...argsList[done ? argi : -argi].split('\n'));
-        if ( done ) { break; }
-    }
-};
-
-const lookupAll = hostname => {
-    for ( const details of declarativeImports ) {
-        lookupHostname(hostname, details, selectors);
-        lookupHostname(`~${hostname}`, details, exceptions);
-    }
-};
-
-self.isolatedAPI.forEachHostname(lookupAll, {
-    hasEntities: declarativeImports.some(a => a.hasEntities)
-});
-
-declarativeImports.length = 0;
-
-const exceptedSelectors = exceptions.length !== 0
-    ? selectors.filter(a => exceptions.includes(a) === false)
-    : selectors;
-if ( exceptedSelectors.length === 0 ) { return; }
-
-/******************************************************************************/
-
-const cssRuleFromProcedural = details => {
-    const { tasks, action } = details;
-    let mq, selector;
-    if ( Array.isArray(tasks) ) {
-        if ( tasks[0][0] !== 'matches-media' ) { return; }
-        mq = tasks[0][1];
-        if ( tasks.length > 2 ) { return; }
-        if ( tasks.length === 2 ) {
-            if ( tasks[1][0] !== 'spath' ) { return; }
-            selector = tasks[1][1];
-        }
-    }
-    let style;
-    if ( Array.isArray(action) ) {
-        if ( action[0] !== 'style' ) { return; }
-        selector = selector || details.selector;
-        style = action[1];
-    }
-    if ( mq === undefined && style === undefined && selector === undefined ) { return; }
-    if ( mq === undefined ) {
-        return `${selector}\n{${style}}`;
-    }
-    if ( style === undefined ) {
-        return `@media ${mq} {\n${selector}\n{display:none!important;}\n}`;
-    }
-    return `@media ${mq} {\n${selector}\n{${style}}\n}`;
-};
-
-const sheetText = [];
-for ( const selector of exceptedSelectors ) {
-    const details = JSON.parse(selector);
-    const ruleText = cssRuleFromProcedural(details);
-    if ( ruleText === undefined ) { continue; }
-    sheetText.push(ruleText);
-}
-
-if ( sheetText.length === 0 ) { return; }
-
-chrome.runtime.sendMessage({
-    what: 'insertCSS',
-    css: sheetText.join('\n'),
-}).catch(( ) => {
-});
-
-/******************************************************************************/
-
-})();
-
-void 0;
diff --git a/platform/mv3/extension/js/scripting/css-procedural-api.js b/platform/mv3/extension/js/scripting/css-procedural-api.js
index 1446cdf7c..5559b2b1a 100644
--- a/platform/mv3/extension/js/scripting/css-procedural-api.js
+++ b/platform/mv3/extension/js/scripting/css-procedural-api.js
@@ -577,8 +577,7 @@ class ProceduralFilterer {
     }
 
     addSelectors(selectors) {
-        for ( const json of selectors ) {
-            const selector = JSON.parse(json);
+        for ( const selector of selectors ) {
             const pselector = new PSelectorRoot(selector);
             this.primeProceduralSelector(pselector);
             this.selectors.push(pselector);
diff --git a/platform/mv3/extension/js/scripting/css-procedural.js b/platform/mv3/extension/js/scripting/css-procedural.js
index f3d006089..376d305e1 100644
--- a/platform/mv3/extension/js/scripting/css-procedural.js
+++ b/platform/mv3/extension/js/scripting/css-procedural.js
@@ -21,7 +21,7 @@
 
 // Important!
 // Isolate from global scope
-(async function uBOL_cssProcedural() {
+(function uBOL_cssProcedural() {
 
 /******************************************************************************/
 
@@ -40,7 +40,7 @@ const lookupHostname = (hostname, details, out) => {
     for (;;) {
         const argi = argsSeqs[seqi++];
         const done = argi > 0;
-        out.push(...argsList[done ? argi : -argi]);
+        out.push(...JSON.parse(argsList[done ? argi : -argi]));
         if ( done ) { break; }
     }
 };
@@ -48,38 +48,88 @@ const lookupHostname = (hostname, details, out) => {
 const lookupAll = hostname => {
     for ( const details of proceduralImports ) {
         lookupHostname(hostname, details, selectors);
-        lookupHostname(`~${hostname}`, details, exceptions);
+        const matches = [];
+        lookupHostname(`~${hostname}`, details, matches);
+        if ( matches.length === 0 ) { continue; }
+        exceptions.push(...matches.map(a => JSON.stringify(a)));
     }
 };
 
 self.isolatedAPI.forEachHostname(lookupAll, {
     hasEntities: proceduralImports.some(a => a.hasEntities)
 });
-
 proceduralImports.length = 0;
 
 const exceptedSelectors = exceptions.length !== 0
-    ? selectors.filter(a => exceptions.includes(a) === false)
+    ? selectors.filter(a => exceptions.includes(JSON.stringify(a)) === false)
     : selectors;
 if ( exceptedSelectors.length === 0 ) { return; }
 
-if ( self.cssProceduralAPI === undefined ) {
-    self.cssProceduralAPI = chrome.runtime.sendMessage({
-        what: 'injectCSSProceduralAPI'
-    }).catch(( ) => {
-    });
+const declaratives = exceptedSelectors.filter(a => a.cssable);
+if ( declaratives.length !== 0 ) {
+    const cssRuleFromProcedural = details => {
+        const { tasks, action } = details;
+        let mq, selector;
+        if ( Array.isArray(tasks) ) {
+            if ( tasks[0][0] !== 'matches-media' ) { return; }
+            mq = tasks[0][1];
+            if ( tasks.length > 2 ) { return; }
+            if ( tasks.length === 2 ) {
+                if ( tasks[1][0] !== 'spath' ) { return; }
+                selector = tasks[1][1];
+            }
+        }
+        let style;
+        if ( Array.isArray(action) ) {
+            if ( action[0] !== 'style' ) { return; }
+            selector = selector || details.selector;
+            style = action[1];
+        }
+        if ( mq === undefined && style === undefined && selector === undefined ) { return; }
+        if ( mq === undefined ) {
+            return `${selector}\n{${style}}`;
+        }
+        if ( style === undefined ) {
+            return `@media ${mq} {\n${selector}\n{display:none!important;}\n}`;
+        }
+        return `@media ${mq} {\n${selector}\n{${style}}\n}`;
+    };
+    const sheetText = [];
+    for ( const details of declaratives ) {
+        const ruleText = cssRuleFromProcedural(details);
+        if ( ruleText === undefined ) { continue; }
+        sheetText.push(ruleText);
+    }
+    if ( sheetText.length !== 0 ) {
+        chrome.runtime.sendMessage({
+            what: 'insertCSS',
+            css: sheetText.join('\n'),
+        }).catch(( ) => {
+        });
+    }
 }
-if ( self.cssProceduralAPI instanceof Promise ) {
-    await self.cssProceduralAPI;
-}
-if ( self.cssProceduralAPI instanceof Object === false ) { return; }
 
-self.cssProceduralAPI.addSelectors(exceptedSelectors);
+const procedurals = exceptedSelectors.filter(a => a.cssable === undefined);
+if ( procedurals.length !== 0 ) {
+    const addSelectors = selectors => {
+        if ( self.cssProceduralAPI instanceof Object === false ) { return; }
+        self.cssProceduralAPI.addSelectors(selectors);
+    };
+    if ( self.cssProceduralAPI === undefined ) {
+        self.cssProceduralAPI = chrome.runtime.sendMessage({
+            what: 'injectCSSProceduralAPI'
+        }).catch(( ) => {
+        });
+    }
+    if ( self.cssProceduralAPI instanceof Promise ) {
+        self.cssProceduralAPI.then(( ) => { addSelectors(procedurals); });
+    } else {
+        addSelectors(procedurals);
+    }
+}
 
 /******************************************************************************/
 
 })();
 
-/******************************************************************************/
-
 void 0;
diff --git a/platform/mv3/make-rulesets.js b/platform/mv3/make-rulesets.js
index 2a1e3d94a..9742d977a 100644
--- a/platform/mv3/make-rulesets.js
+++ b/platform/mv3/make-rulesets.js
@@ -1059,84 +1059,12 @@ async function processCosmeticFilters(assetDetails, mapin) {
 
 /******************************************************************************/
 
-async function processDeclarativeCosmeticFilters(assetDetails, mapin) {
-    if ( mapin === undefined ) { return 0; }
-    if ( mapin.size === 0 ) { return 0; }
-
-    // Distinguish declarative-compiled-as-procedural from actual procedural.
-    const declaratives = new Map();
-    mapin.forEach((details, jsonSelector) => {
-        const selector = JSON.parse(jsonSelector);
-        if ( selector.cssable !== true ) { return; }
-        selector.cssable = undefined;
-        declaratives.set(JSON.stringify(selector), details);
-    });
-    if ( declaratives.size === 0 ) { return 0; }
-
-    const contentArray = groupHostnamesBySelectors(
-        groupSelectorsByHostnames(declaratives)
-    );
-
-    const argsMap = contentArray.map(entry => [
-        entry[0],
-        entry[1].a ? entry[1].a.join('\n') : undefined,
-    ]);
-    const hostnamesMap = new Map();
-    let hasEntities = false;
-    for ( const [ id, details ] of contentArray ) {
-        if ( details.y ) {
-            scriptletHostnameToIdMap(details.y, id, hostnamesMap);
-            hasEntities ||= details.y.some(a => a.endsWith('.*'));
-        }
-        if ( details.n ) {
-            scriptletHostnameToIdMap(details.n.map(a => `~${a}`), id, hostnamesMap);
-            hasEntities ||= details.n.some(a => a.endsWith('.*'));
-        }
-    }
-    const { argsList, argsSeqs } = argsMap2List(argsMap, hostnamesMap);
-
-    const originalScriptletMap = await loadAllSourceScriptlets();
-    let patchedScriptlet = originalScriptletMap.get('css-declarative').replace(
-        '$rulesetId$',
-        assetDetails.id
-    );
-    patchedScriptlet = safeReplace(patchedScriptlet,
-        /\bself\.\$argsList\$/,
-        `${JSON.stringify(argsList, scriptletJsonReplacer)}`
-    );
-    patchedScriptlet = safeReplace(patchedScriptlet,
-        /\bself\.\$argsSeqs\$/,
-        `${JSON.stringify(argsSeqs, scriptletJsonReplacer)}`
-    );
-    patchedScriptlet = safeReplace(patchedScriptlet,
-        /\bself\.\$hostnamesMap\$/,
-        `${JSON.stringify(hostnamesMap, scriptletJsonReplacer)}`
-    );
-    patchedScriptlet = safeReplace(patchedScriptlet,
-        'self.$hasEntities$',
-        JSON.stringify(hasEntities)
-    );
-    writeFile(`${scriptletDir}/declarative/${assetDetails.id}.js`, patchedScriptlet);
-
-    if ( contentArray.length !== 0 ) {
-        log(`CSS-declarative: ${declaratives.size} distinct filters`);
-        log(`\tCombined into ${hostnamesMap.size} distinct hostnames`);
-    }
-
-    return hostnamesMap.size;
-}
-
-/******************************************************************************/
-
 async function processProceduralCosmeticFilters(assetDetails, mapin) {
     if ( mapin === undefined ) { return 0; }
     if ( mapin.size === 0 ) { return 0; }
 
-    // Distinguish declarative-compiled-as-procedural from actual procedural.
     const procedurals = new Map();
     mapin.forEach((details, jsonSelector) => {
-        const selector = JSON.parse(jsonSelector);
-        if ( selector.cssable ) { return; }
         procedurals.set(jsonSelector, details);
     });
     if ( procedurals.size === 0 ) { return 0; }
@@ -1162,6 +1090,14 @@ async function processProceduralCosmeticFilters(assetDetails, mapin) {
         }
     }
     const { argsList, argsSeqs } = argsMap2List(argsMap, hostnamesMap);
+    const argsListAfter = [];
+    for ( const a of argsList ) {
+        const aAfter = [];
+        for ( let b of a ) {
+            aAfter.push(JSON.parse(b));
+        }
+        argsListAfter.push(JSON.stringify(aAfter));
+    }
     const originalScriptletMap = await loadAllSourceScriptlets();
     let patchedScriptlet = originalScriptletMap.get('css-procedural').replace(
         '$rulesetId$',
@@ -1169,7 +1105,7 @@ async function processProceduralCosmeticFilters(assetDetails, mapin) {
     );
     patchedScriptlet = safeReplace(patchedScriptlet,
         /\bself\.\$argsList\$/,
-        `${JSON.stringify(argsList, scriptletJsonReplacer)}`
+        `${JSON.stringify(argsListAfter, scriptletJsonReplacer)}`
     );
     patchedScriptlet = safeReplace(patchedScriptlet,
         /\bself\.\$argsSeqs\$/,
@@ -1333,10 +1269,6 @@ async function rulesetFromURLs(assetDetails) {
         assetDetails,
         declarativeCosmetic
     );
-    const declarativeStats = await processDeclarativeCosmeticFilters(
-        assetDetails,
-        proceduralCosmetic
-    );
     const proceduralStats = await processProceduralCosmeticFilters(
         assetDetails,
         proceduralCosmetic
@@ -1376,7 +1308,6 @@ async function rulesetFromURLs(assetDetails) {
             generic: genericCosmeticStats,
             generichigh: genericHighCosmeticStats,
             specific: specificCosmeticStats,
-            declarative: declarativeStats,
             procedural: proceduralStats,
         },
         scriptlets: scriptletStats,
diff --git a/platform/mv3/scriptlets/css-declarative.template.js b/platform/mv3/scriptlets/css-declarative.template.js
deleted file mode 100644
index f7d467600..000000000
--- a/platform/mv3/scriptlets/css-declarative.template.js
+++ /dev/null
@@ -1,42 +0,0 @@
-/*******************************************************************************
-
-    uBlock Origin Lite - a comprehensive, MV3-compliant content blocker
-    Copyright (C) 2014-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
-*/
-
-// ruleset: $rulesetId$
-
-// Important!
-// Isolate from global scope
-(function uBOL_cssDeclarativeImport() {
-
-/******************************************************************************/
-
-const argsList = self.$argsList$;
-const argsSeqs = self.$argsSeqs$;
-const hostnamesMap = new Map(self.$hostnamesMap$);
-const hasEntities = self.$hasEntities$;
-
-self.declarativeImports = self.declarativeImports || [];
-self.declarativeImports.push({ argsList, argsSeqs, hostnamesMap, hasEntities });
-
-/******************************************************************************/
-
-})();
-
-/******************************************************************************/