disable hidden tabs feature
I have a lot of tabs open. I like it that way, but if I close a tab the "hidden tabs" feature gets activated. And all the tabs go away. It isn't a huge issue it is just very annoying. How can I disable this annoying feature?
Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or userChrome.css is causing the problem.
- switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
- do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window