608990 - New Tab (click on '+') doesn't work sometimes

Status: RESOLVED DUPLICATE of bug 613241

(Firefox :: Tabbed Browser, defect)

Description

[alex6]

User-Agent:       Mozilla/5.0 (Windows NT 5.1; rv:2.0b6) Gecko/20100101 Firefox/4.0b6
Build Identifier: Mozilla/5.0 (Windows NT 5.1; rv:2.0b6) Gecko/20100101 Firefox/4.0b6

When several tabs are opened, the '+' button which lets you open a new tab doesn't work well. If the mouse pointer is over the '+', the click will not work.
But you put the pointer around the '+' it will work.

Then, if you open a new tab, the '+' button will work normally. If you close the newly tab, the '+' button won't work.

In my case, there was 3 tabs opened when it happened.
Possible that it happens when tabs are always opened.

Reproducible: Couldn't Reproduce

Comment 1

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Is it reproducible for you? Do you see any failures in the Error Console (reachable under Tools menu)? Does it also happen in Safe Mode (http://support.mozilla.com/en-US/kb/Safe Mode)?

Comment 2

[Stefan Ring]

I frequently experience this as well. I'm using Firefox on Linux x86_64 (Fedora 13), built from Mercurial (Tag: FIREFOX_4_0b7_RELEASE).

I have not yet observed any predictable circumstances which cause this to happen, but I will try to have a look at the error console the next time this occurs.

Comment 3

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Would be great to have some reproducible steps here so we could do a regression test. Is this new in Firefox 4.0?

Comment 4

[Stefan Ring]

(In reply to comment #3)
> Is this new in Firefox 4.0?

Yes. I can definitely say that.

Comment 5

[alex6]

(In reply to comment #3)
> Is this new in Firefox 4.0?

I also confirm that. Sometimes i use the older version (3.6x) in order to use some plug-ins not yet compatible with the new version, and i never encountered this problem.

Comment 6

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Any steps to reproduce this bug with a fresh profile? That would help a lot.

Also please check the older beta releases of Firefox 4.0, which could give as a hint when it has been started.

ftp://ftp.mozilla.org/pub/firefox/releases/

Comment 7

[Henrik Skupin [:whimboo][⌚️UTC+1]]

Dao, I assume it's also a dupe of bug 608589 then?