Intermittent artifact (vertical line) on tab

[dcog989]

I think this issue began after installing 1.8.134.

The vertical line shown in the screenshot sometimes appears randomly on a single tab. It will disappear if I switch tabs. I haven't worked out how to reproduce it.

[QNetITQ]

I managed to reproduce such a bug. For some reason, the browser cannot correctly calculate the indents in some cases. Apparently, Mozilla uses aggressive caching. I'll try to disable it, it should help.

[QNetITQ]

Made some changes. Now tabs should not be torn. At least I was not able to reproduce this bug after fixing.

[dcog989]

I've just installed and had a quick play - looks good. Assume fixed unless I report back.

That was quite a major rework to the code. Impressive.