Edit: Found a exact duplicate over on meta.StackOverflow: How do I remove a frequented tag?How do I remove a frequented tag?
In the upper right corner of the main page (below Ask Question) it says:
Frequented Tags
[firefox]
This seems to be resposible for ugly blue bars across the question list (please correct me if this is false), so I'd like to remove it, but doesnt seem to show up under prefs.
Edit: screenshot: