I'm on Ubuntu 12.04 and constantly experience trouble browsing, i.e. extremely slow-loading websites. I'm fairly confident it's not just a network problem.
Sometimes I find that when Chrome repeatedly times out, Firefox works better. However, googling anything from Firefox usually brings me to the Google error message:
It appears your computer is sending automated requests, where I have to enter a captcha to continue. These error messages also indicate that my queries are coming from strange IPs from all over the world. The last one a few minutes ago was 18.104.22.168 (supposedly in Florida, though I'm in Ontario).
Googling these IPs usually brings up some databases about spambots and some lists of Tor end nodes. I once had a Torbutton extension installed in Firefox but it was buggy so I removed it.
Could my surfing problems be the result of a remaining Tor configuration within Firefox and the result of something unrelated in Chrome? Is it likely that I have been made a spambot and need a clean install of the OS? How could I diagnose the Tor theory further?