https://www.reddit.com/r/firefox/comments/ny2199/the_facebook_container_tab_indicator_in_firefox/ https://www.reddit.com/r/firefox/comments/ny2199/the_faceboo..

https://www.reddit.com/r/firefox/comments/ny2199/the_facebook_container_tab_indicator_in_firefox/ https://www.reddit.com/r/firefox/comments/ny2199/the_faceboo... As per the /r/firefox subreddit, Mozilla refuses to listen / prioritize this issue.