My STR are usually: 1) Cmd+T to open a new tab 2) enter "bug " + Cmd+V to paste a bug #, press Enter While the new page is loading, I sometimes see an unstyled empty button in the top left. I finally figured out that this was part of the new tab page that was partially loaded (without CSS styles etc.). I most often notice this when my machine is otherwise under load (i.e. when I have a build running in the background and CPU and I/O are both constrained). I've only seen this in the past couple of weeks or two, though, so I think something changed to make this happen more frequently.
Per policy at https://wiki.mozilla.org/Bug_Triage/Projects/Bug_Handling/Bug_Husbandry#Inactive_Bugs. If this bug is not an enhancement request or a bug not present in a supported release of Firefox, then it may be reopened.
Status: NEW → RESOLVED
Last Resolved: 12 hours ago
Resolution: --- → INACTIVE
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