User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:89.0) Gecko/20100101 Firefox/89.0
Steps to reproduce:
Multiple rows of tabs are essential to my use of Firefox, and many other people. It's hard to have many tabs open and manage them without the ability to have multiple rows of them.
Installing this file as userChrome.css under Firefox 89's Proton user interface enables multiple rows of tabs:
It works very well– as if it were built in. Can you build in this CSS, and set the right config settings, based on a configuration setting? This would allow many more people to use this feature.
Got multiple rows of tabs by installing a custom userChrome.css file.
I should be able to set a configuration setting and turn this on, instead of installing a userChrome.css file and having to manipulate a bunch of configuration settings.