734771 - Tabstrip has left / right arrows, in a new Firefox window, even though it's nowhere close to overflowing

Status: RESOLVED DUPLICATE of bug 734273

(Firefox :: Tabbed Browser, defect)

Description

[Daniel Holbert [:dholbert]]

STEPS TO REPRODUCE:
 1. Start firefox with a fresh profile.
 2. Inspect tab strip.

ACTUAL RESULTS:
Some significant percentage of the time, there will be a leftarrow at the left end of tab strip, taking up space, even though I only have 2 tabs open (firstrun page & about:home)

EXPECTED RESULTS:
No leftarrow at left end of tab strip.

===============
ADDITIONAL STEPS TO MAKE ARROWS GO AWAY: (after step 2 above)
 3. Hit Ctrl+T about 10 times (creating tabs until the tab strip overflows)
 4. Now close tabs until the tab strip no longer overflows.
   --> At this point, the arrows disappear.

Without doing steps 3 & 4, the arrow sticks around in my tabstrip, cluttering it up.

Mozilla/5.0 (X11; Linux x86_64; rv:13.0) Gecko/20120311 Firefox/13.0a1

Comment 1

[Daniel Holbert [:dholbert]]

Attachment: screenshot of bug

Here's a screenshot of a just-opened Firefox window, using a fresh profile.

Comment 2

[Daniel Holbert [:dholbert]]

Attachment: screencast of procedure for making arrows go away

...and here's a screencast of the "ADDITIONAL STEPS" I mentioned in comment 0, for getting to a good state (no arrows)