diff --git a/src/browserExt/background.js b/src/browserExt/background.js
index 350f8bd9e..9b613169d 100644
--- a/src/browserExt/background.js
+++ b/src/browserExt/background.js
@@ -27,13 +27,6 @@ if (!Zotero.isManifestV3) {
 	browser.action = browser.browserAction;
 }
 
-// Some websites break when injecting translation sandbox iframe into
-// the website's first iframe (which we do for websites like ebscohost
-// where often the translatable site is not the top frame, but first child frame).
-const INJECTION_BLACKLIST = new Set([
-	'lastpass.com'
-])
-
 Zotero.Connector_Browser = new function() {
 	var _tabInfo = {};
 	var _incompatibleVersionMessageShown;
@@ -265,10 +258,6 @@ Zotero.Connector_Browser = new function() {
 			// Injected via the manifest file
 			return;
 		} else {
-			if (Zotero.isManifestV3) {
-				const host = new URL(url).host;
-				if (INJECTION_BLACKLIST.has(host)) return;
-			}
 			let tabInfo = this.getTabInfo(tab.id);
 			if (!tabInfo.frameChecked) {
 				// Also in the first frame detected