Inexplicable black line appearing over my tab?
My firefox updated to the (horrible) new tabs, and now there's an incredibly annoying black line that appears over my Facebook tab that I can't find any way to get rid of. What does this mean? What is it for? How do I kill this stupid thing? With the (terrible) way the new tabs distinguish between the active tab and the inactive tabs (basically just a slightly different, nearly indistinguishable shade of off-white), this black bar is the most striking visual element on my row of tabs, so it grabs the eye the way the active tab should, and it's confusing and distracting.
Chosen solution
Do you have the Facebook Container addon?
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Do you have the Facebook Container addon?
A number of users have said that the container color line moving from the bottom of the tab to the top of the tab is more distracting. I'm not aware of a built-in way to modify the position, shape, or length of this line, but possibly custom style rules in a userChrome.css file (a community-supported workaround) might help. There's an active subreddit for hacking Firefox's interface with style rules here where you might find more guidance:
Thanks guys, that's fixed me, apparently it was the Facebook Container addon that was adding that annoying line.