Whenever there's a tab open, it's always surrounded by a rectangular red outline in the shape of the Firefox tab. Even in incognito mode & when I use custom tab shapes, it's always there.
I don't know what's causing it, but it doesn't appear to be tied to any specific version (It appeared in the last version of Firefox GX I downloaded [127] in addition to today's updated release [128], and it appeared in both Firefox beta versions I've used [128 & 129])
Whenever there's a tab open, it's always surrounded by a rectangular red outline in the shape of the Firefox tab. Even in incognito mode & when I use custom tab shapes, it's always there.
I don't know what's causing it, but it doesn't appear to be tied to any specific version (It appeared in the last version of Firefox GX I downloaded [127] in addition to today's updated release [128], and it appeared in both Firefox beta versions I've used [128 & 129])