diff --git a/package-lock.json b/package-lock.json
index 956f391..e7d3032 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,6 +10,8 @@
 			"license": "MIT",
 			"dependencies": {
 				"webext-content-scripts": "^2.6.0",
+				"webext-detect-page": "^5.0.1",
+				"webext-events": "^2.2.2",
 				"webext-polyfill-kinda": "^1.0.2"
 			},
 			"devDependencies": {
@@ -8692,6 +8694,31 @@
 				"url": "https://github.com/sponsors/fregante"
 			}
 		},
+		"node_modules/webext-detect-page": {
+			"version": "5.0.1",
+			"resolved": "https://registry.npmjs.org/webext-detect-page/-/webext-detect-page-5.0.1.tgz",
+			"integrity": "sha512-HizogkTmviA5qA1yODwewzz4ETSc+N9bYrK6pEVIAP2kAG139Sg+3DOJixRnFYl2gFVZn4PBReDZhgmFOEVbeg==",
+			"engines": {
+				"node": ">=18"
+			},
+			"funding": {
+				"url": "https://github.com/sponsors/fregante"
+			}
+		},
+		"node_modules/webext-events": {
+			"version": "2.2.2",
+			"resolved": "https://registry.npmjs.org/webext-events/-/webext-events-2.2.2.tgz",
+			"integrity": "sha512-ZJxCIzhkj9MhqtYeN6nPIuH3N/qi+prcRNL0cXRx0JohnSuhlp4eZWuYBHAS+JGlq/BUnbB82ojZ62QOwR/caQ==",
+			"dependencies": {
+				"webext-detect-page": "^5.0.1"
+			},
+			"engines": {
+				"node": ">=18"
+			},
+			"funding": {
+				"url": "https://github.com/sponsors/fregante"
+			}
+		},
 		"node_modules/webext-patterns": {
 			"version": "1.3.0",
 			"resolved": "https://registry.npmjs.org/webext-patterns/-/webext-patterns-1.3.0.tgz",
diff --git a/package.json b/package.json
index 952433c..72cef12 100644
--- a/package.json
+++ b/package.json
@@ -45,6 +45,8 @@
 	},
 	"dependencies": {
 		"webext-content-scripts": "^2.6.0",
+		"webext-detect-page": "^5.0.1",
+		"webext-events": "^2.2.2",
 		"webext-polyfill-kinda": "^1.0.2"
 	},
 	"devDependencies": {
diff --git a/source/inject.ts b/source/inject.ts
index 29a1a66..7f3ce56 100644
--- a/source/inject.ts
+++ b/source/inject.ts
@@ -1,4 +1,5 @@
 import {injectContentScript, isScriptableUrl} from 'webext-content-scripts';
+import {isPersistentBackgroundPage} from 'webext-detect-page';
 import chromeP from 'webext-polyfill-kinda';
 
 const acceptableInjectionsCount = 10;
@@ -42,11 +43,8 @@ function onActivated({tabId}: {tabId: number}) {
 	}
 }
 
-const background = globalThis.chrome?.runtime.getManifest().background;
-const permissions = globalThis.chrome?.runtime.getManifest().permissions;
-const isPersistentBackgroundPage = background && !('service_worker' in background) && background.persistent !== false;
-
 export default async function progressivelyInjectScript(contentScript: ContentScript) {
+	const permissions = globalThis.chrome?.runtime.getManifest().permissions;
 	if (!permissions?.includes('tabs')) {
 		throw new Error('webext-inject-on-install: The "tabs" permission is required');
 	}
@@ -60,8 +58,9 @@ export default async function progressivelyInjectScript(contentScript: ContentSc
 		return;
 	}
 
-	// TODO: Non-persistent pages support via chrome.storage.session https://github.com/fregante/webext-dynamic-content-scripts/issues/1
-	const singleInjection = !isPersistentBackgroundPage || scriptableTabs.length <= acceptableInjectionsCount;
+	// TODO: Non-persistent pages support via chrome.storage.session
+	// https://github.com/fregante/webext-inject-on-install/issues/4
+	const singleInjection = !isPersistentBackgroundPage() || scriptableTabs.length <= acceptableInjectionsCount;
 	console.debug('webext-inject-on-install: Single injection?', singleInjection);
 
 	for (const tab of scriptableTabs) {
diff --git a/source/register.ts b/source/register.ts
index 51eaf06..cfe4f75 100644
--- a/source/register.ts
+++ b/source/register.ts
@@ -1,15 +1,18 @@
+import {onExtensionStart} from 'webext-events';
 import progressivelyInjectScript from './inject.js';
 
 if (globalThis.chrome && !navigator.userAgent.includes('Firefox')) {
-	const {content_scripts: scripts} = chrome.runtime.getManifest();
+	onExtensionStart.addListener(() => {
+		const {content_scripts: scripts} = chrome.runtime.getManifest();
 
-	if (!scripts?.length) {
-		throw new Error('webext-inject-on-install tried to inject content scripts, but no content scripts were found in the manifest.');
-	}
+		if (!scripts?.length) {
+			throw new Error('webext-inject-on-install tried to inject content scripts, but no content scripts were found in the manifest.');
+		}
 
-	console.debug('webext-inject-on-install: Found', scripts.length, 'content script(s) in the manifest.');
+		console.debug('webext-inject-on-install: Found', scripts.length, 'content script(s) in the manifest.');
 
-	for (const contentScript of scripts) {
-		void progressivelyInjectScript(contentScript);
-	}
+		for (const contentScript of scripts) {
+			void progressivelyInjectScript(contentScript);
+		}
+	});
 }