Errors

[Arcrom]

You can also run tools like adwcleaner to scan possible adds in your browser that you are unaware of.
 
For cookies/stuff: CCleaner can do the job easily.
 
If you decide to uninstall your browser, a full clean up during the processes is recommended. I use Revo Unistaller since it detects remaining junk from the program.
 
There are others programs like these ones that can do the job, just posting the ones that I use from a long time and never got me a problem.