diff --git a/gulpfile.js b/gulpfile.js
index 80910fa36f..d341128470 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -226,6 +226,8 @@ function processFile() {
 				file.contents = Buffer.from(file.contents.toString()
 					.replace("/*BACKGROUND SCRIPTS*/",
 						backgroundInclude.map((s) => `"${s}"`).join(',\n\t\t\t'))
+					.replace("/*INJECT SCRIPTS*/",
+						injectIncludeBrowserExt.map((s) => `"${s}"`).join(',\n\t\t'))
 					.replace(/"version": "[^"]*"/, '"version": "'+argv.version+'"'));
 				break;
 			case 'script-injection.js':
diff --git a/src/browserExt/background.js b/src/browserExt/background.js
index 1d7d5864c8..676bf0e77b 100644
--- a/src/browserExt/background.js
+++ b/src/browserExt/background.js
@@ -358,7 +358,7 @@ Zotero.Connector_Browser = new function() {
 	browser.webNavigation.onCommitted.addListener(logListenerErrors(async function(details) {
 		var tab = await browser.tabs.get(details.tabId);
 		// Ignore developer tools
-		if (tab.id < 0 || _isDisabledForURL(tab.url, true)) return;
+		if (tab.id < 0 || Zotero.Connector_Browser.isDisabledForURL(tab.url, true)) return;
 
 		if (details.frameId == 0) {
 			// Ignore item selector
diff --git a/src/browserExt/script-injection.js b/src/browserExt/script-injection.js
index 884bb4551e..b54537248c 100644
--- a/src/browserExt/script-injection.js
+++ b/src/browserExt/script-injection.js
@@ -42,7 +42,7 @@ Zotero.Extension.ScriptInjection = {
 		let key = tab.id+'-'+frameId;
 		let deferred = this.injectTranslationScripts[key];
 		if (deferred) {
-			Zotero.debug(`Extension.ScriptInjection.injectTranslationScripts: Script injection already in progress for ${key} : ${tab.url}`);
+			Zotero.debug(`Translation Inject: Script injection already in progress for ${key}`);
 			return deferred.promise;
 		}
 		deferred = Zotero.Promise.defer();
@@ -52,13 +52,14 @@ Zotero.Extension.ScriptInjection = {
 			Zotero.debug(`Translation Inject: Script injection rejected ${key}`);
 			Zotero.debug(e.message);
 		}).then(function() {
-			delete Zotero.Connector_Browser.injectTranslationScripts[key];
+			delete Zotero.Extension.ScriptInjection.injectTranslationScripts[key];
 		});
 		
 		Zotero.Messaging.sendMessage('ping', null, tab, frameId).then(function(response) {
 			if (response && frameId == 0) return deferred.resolve();
 			Zotero.debug(`Injecting translation scripts into ${frameId} ${tab.url}`);
-			return Zotero.Connector_Browser.injectScripts(_injectTranslationScripts, tab, frameId)
+			return Zotero.Connector_Browser.injectScripts(
+				Zotero.Extension.ScriptInjection._translationScriptList, tab, frameId)
 			.then(deferred.resolve).catch(deferred.reject);
 		});
 		return deferred.promise;
@@ -114,8 +115,8 @@ Zotero.Extension.ScriptInjection = {
 		
 		var timedOut = Zotero.Promise.defer();
 		let timeout = setTimeout(function() {
-			timedOut.reject(new Error (`Inject: Timed out ${frameId} - ${tab.url} after ${this.INJECTION_TIMEOUT}ms`))
-		}.bind(this), this.INJECTION_TIMEOUT);
+			timedOut.reject(new Error (`Inject: Timed out ${frameId} - ${tab.url} after ${Zotero.Extension.ScriptInjection.INJECTION_TIMEOUT}ms`))
+		}, Zotero.Extension.ScriptInjection.INJECTION_TIMEOUT);
 		
 		// Prevent triggering multiple times
 		let deferred = Zotero.Connector_Browser._tabInfo[tab.id].injections[frameId];
@@ -153,7 +154,7 @@ Zotero.Extension.ScriptInjection = {
 		} finally {
 			browser.tabs.onRemoved.removeListener(tabRemovedListener);
 			deferred.resolve();
-			delete _tabInfo[tab.id].injections[frameId];
+			delete Zotero.Connector_Browser._tabInfo[tab.id].injections[frameId];
 			clearTimeout(timeout);
 		}
 	}
diff --git a/src/browserExt/test/testSetup.js b/src/browserExt/test/testSetup.js
index 39208e0d37..b5e49c1219 100644
--- a/src/browserExt/test/testSetup.js
+++ b/src/browserExt/test/testSetup.js
@@ -106,7 +106,7 @@ Zotero.initDeferred.promise.then(function() {
 			
 			let scripts = [ 'lib/sinon.js', 'test/testSetup.js' ];
 			try {
-				await Zotero.Extension.injectScripts(scripts, tab);
+				await Zotero.Connector_Browser.injectScripts(scripts, tab);
 				deferred.resolved = true;
 				deferred.resolve(tab.id);
 			} catch(e) {
@@ -152,6 +152,10 @@ if (typeof mocha != 'undefined') {
 				var deferred = Zotero.Promise.defer();
 				var tab = await browser.tabs.create({url, active: false});
 				Zotero.Background.registeredTabs[tab.id] = deferred;
+				Zotero.Connector_Browser._tabInfo[tab.id] = {
+					url: url,
+					injections: {}
+				};
 				return deferred.promise;
 			}, url);
 		}),