I had a problem with a website that I like to use using buggy javascript to repeatedly redirect me to an advertising page where I had checked the option many times over not to return me to that page. I contacted the webmasters, but they were no help whatsoever, and I was seriously considering having to quit using that website.

But then I found this add-on, "Request Control", and long story short, after setting up a "rule" to prevent that unwanted advertising page from appearing again, the buggy website now functions perfectly in spite of its own crappy/buggy programming. So thank you very much to Tumpio for a job very well done, your add-on does a truly terrific job, and I highly recommend it to anybody who is considering installing it.