You could also use Firefox Nightly - a very unstable testing version of Firefox equivalent to Chrome’s Canary releases. This special edition of Firefox comes with built-in developer tools, and it also allows you to install unsigned Firefox add-ons. Mozilla’s solution to this is Firefox Developer Edition. (This change takes effect in Firefox 44.) As with Chrome, this helps protect against malware.
However, Mozilla does prevent you from installing extensions that haven’t been signed by Mozilla. This means that you can only install Firefox add-ons Mozilla has received and signed-off on. Mozilla doesn’t actually limit you to extensions from the Mozilla Add-ons Gallery.
However, Chrome only allows this on computers connected to a Windows domain. You’ll be informed that the extension was installed from outside the official extension store and asked to confirm the installation.įor enterprise deployments, Google Chrome allows you to install non-Web-Store extensions via Group Policy. To do this in Opera, open the extensions page and drag-and-drop a. Install Opera and you can load Chrome extensions from wherever you like. Opera is based on Chromium and supports Chrome extensions. Chromium itself does appear to have this restriction, so you can’t just install Chromium. You could instead install another browser based on Chromium, which is the open-source project that’s the basis for Chrome. The same appears to be true for the Chrome Canary builds - they don’t allow you to install non-Web-Store extensions.
However, malicious programs were forcing Chrome to switch to the developer channel on users’ computers, so the developer channel now also has this restriction. Google previously allowed you to switch to the unstable “Developer” channel of Chrome and install extensions from outside the Web Store on that build. This message is designed to prevent developer mode from being used for malware. However, Chrome will remind you you’re using such an unpacked extension every time you launch it. You can do this with the existing version of Chrome you have. Navigate to the extension’s directory and open it. Click the “Developer mode” checkbox to activate it, and then click the “Load unpacked extension” button. To do this, open the Extensions page - click the menu button, point to “More tools”, and select “Extensions”.
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