You can also fix it with a custom userChrome.css, which lets you set the min and max tab width before they begin to scroll.
In other words you can make it so that if one or two tabs are open they take all the space and the more you open they all shrink equally up to a point.
On ff?
librewolf, but should work on firefox.
Here is mine, it is very keyboard driven so it might not work for you, but you can copy the tab width settings: https://pastebin.com/f5AvQuJu
SvensKia@kbin.social to 
You can also fix it with a custom userChrome.css, which lets you set the min and max tab width before they begin to scroll.
In other words you can make it so that if one or two tabs are open they take all the space and the more you open they all shrink equally up to a point.
On ff?
librewolf, but should work on firefox.
Here is mine, it is very keyboard driven so it might not work for you, but you can copy the tab width settings: https://pastebin.com/f5AvQuJu
https://streamable.com/wj7iri
Thank you