I love the add-on. It does not slow my PC down any. As far as one reviewer's comments about turning off cookies and/or using Tor, etc. Nice in theory, but doesn't work well in practice. Many sites will not work if you turn cookies off and many others will not work when running Tor. The situation with these solutions remains that way and so I nixed both of them a long time ago. TMN is a great add-on. And benchmarking and resource usage tools I use show it is virtually no load on the machine. As far as wasting search engines resources, well if they prevented people from tracking search results the comment would be valid. But since they don't, TMN, TMN, TMN.