Reproducible with: Firefox 34 Beta 8 - BuildID: 20141110195804 Latest Firefox 35 Aurora - BuildID: 20141113004001 Latest Firefox 36 Aurora - BuildID: 20141113030201 Environment: Mac OS X 10.9.5 (Macbook retina), Windows 7 x64 Steps to reproduce: 1. Start Firefox with a clean profile, go to the panel menu, select customize and add the Hello button to the toolbar. 2. Exit customization, then click on the Hello button and see how the Loop panel opens. 3. Go to Add-ons and add a new theme. 4. Click the Hello button again and see how the Loop panel opens. Expected results: The Loop panel opens at its fixed size without any UI issue. Actual results: The Loop panel flickers as it opens, as it seems it initially opens at a slightly different size and then is displayed at normal size. The issue was for me more visible on the Macbook than on Win 7 x64, where the flickering is barely visible. See http://www.screencast.com/t/pacG5UMN. Note that this happens only once after the theme is changed. Opening the panel afterwards does not have this issue.
Realistically I can't see us fixing this.
Status: NEW → RESOLVED
Last Resolved: 3 years ago
Resolution: --- → WONTFIX
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