I want to select multiple Tabs from a bookmark folder to open in the background. On Chrome this used to be quite easy: Just open the Dropdown, click whichever tabs you wanted to open with the Mousewheel and done. On Firefox you need to enable new tabs to open in Background first. I managed to find the setting for that with google after a while. You need to go to advanced settings by typing about:config into your url bar. Then you search for browser.tabs.loadBookmarksInBackground and click "enable". But this didn't fix the other issue I had, that the dropdown menu always closes as soon as I click anything. Is there a way so it stays open until I'm done selecting the pages I want?