User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:28.0) Gecko/20100101 Firefox/28.0 (Beta/Release) Build ID: 20131118094134 Steps to reproduce: 1. Open two tabs. 2. Select the first one. 3. Move mouse over the first tab and leave it be. 4. Press Ctrl+T to open a new tab (no touching mouse yet). 5. Observe curvy outline around the first tab. 6. Start typing something in AwesomeBar so that suggests pop up (focus should be already there; if not, press Ctrl+L, do not touch mouse yet). 7. Observe outline around the first tab disappear at all. 8. Move mouse to awesomebar popup. 9. Observe tab separator appear between first two tabs. 10. Move mouse back over the first tab. 11. Observe curvy outline around the first tab. Actual results: Thus we can see inconsistent outlining of the inactive but hovered tab. Expected results: For consistency the first tab should stay curvy-outlined when the awesomebar popup appears, as it gets this outline if hovered again with popup present.

I can't reproduce this. Is it still happening?

Just reproduced with the same steps on latest Nightly (29.0a1 (2014-01-15)).

Confirmed in Nightly 29.0a1 (2014-01-30), Ubuntu 13.04 x64. Not repro on Win 7, Mac OS X 10.9