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Frequently asked questions
Danny Colin edited this page Dec 30, 2025
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Warning: This workaround needs an add-on that is not actively monitored for security by Mozilla. Make sure you trust it before installing.
- Install Open URL in Container addon.
- Open bookmark manager by clicking on Main menu > Bookmarks > Manage bookmarks
- Create a new bookmark by clicking on Organize > Add bookmark...
- Enter a name for the new bookmark (e.g. Containerize a Bookmark)
- Enter the following code snippet in URL:
javascript:(function(c,u){c&&(c=c.trim())&&(u=prompt('URL?',location))&&(u=u.trim())&&prompt('Contained URL to copy and bookmark:','ext+container:name='+encodeURIComponent(c)+'&url='+encodeURIComponent(u))})(prompt('Container name?','Personal'))
- Add the bookmark in a place where you can click on it like the Bookmarks toolbar (Ctrl + B). Note that you can't launch a bookmarklet by searching for it in the address bar.
- Go to the site you want to run in a specific container.
- Click the bookmarklet you created, pick the container name and copy the link.
- Create or edit some existing bookmark to set it to this link.
- Type about:addons in the address bar
- Click on the gear button over the extension list in the top-right corner
- Click "Manage Extension Shortcuts"
