https://connect.mozilla.org/t5/discussions/vertical-tabs-and-expand-on-hover-video-issue/m-p/125445#M49503 <P>As stated in title when Vertical tabs and expand on hover are both enabled, when i go into fullscreen for video the side where the vertical tab is has a black bar. I've tried to take a screenshot of it, but whenever i screenshot it the video comes out normal without showing what i'm talking about.</P><P>I forgot to mention , i have the firefox nova ui enabled , it doesn't do this in the default firefox.</P> Sat, 16 May 2026 13:11:05 GMT JoeySav 2026-05-16T13:11:05Z https://connect.mozilla.org/t5/discussions/vertical-tabs-and-expand-on-hover-video-issue/m-p/125445#M49503 <P>As stated in title when Vertical tabs and expand on hover are both enabled, when i go into fullscreen for video the side where the vertical tab is has a black bar. I've tried to take a screenshot of it, but whenever i screenshot it the video comes out normal without showing what i'm talking about.</P><P>I forgot to mention , i have the firefox nova ui enabled , it doesn't do this in the default firefox.</P> Sat, 16 May 2026 13:11:05 GMT https://connect.mozilla.org/t5/discussions/vertical-tabs-and-expand-on-hover-video-issue/m-p/125445#M49503 JoeySav 2026-05-16T13:11:05Z