Have you ever see the following error message when you are trying to access YouTube using Firefox?
Bad Request
Your browser sent a request that this server could not understand.
Size of a request header field exceeds server limit.Cookie: VISITOR_INFO1_LIVE
It used to happen to me. Then after a while, it’s gone, and now it’s back at a higher frequency. I have to clear the cookies every single day to do away with the error message.
After a bit of Googling, it turns out that there are quite a lot of other Firefox users with the same problem. If you are one of them, try the following steps to see if it helps:
- Locate your Firefox profile folder (how?)
- Delete cookies.sqlite and cookies.txt
It works well for me.

For whatever reason, ImageShack has decided to stop developing the Imageshack right-click Firefox add-on since its last update on 26th December 2006. The latest official version is not compatible with Firefox 3 and Firefox 3.5 beta. It’s such a convenient add-on that there’s no reason to abandon it.
Not every web hosting provider bundles Fantastico or its equivalent into your hosting plan. Even if they do, sometimes it wouldn’t work (been there, done that, not on Fantastico though, but on DreamHost’s one-click-install). In this case, your best bet is to download the entire WordPress script at 1.8 MB with over 600 files in it and upload all of them to your server.
My Gmail Notifier Firefox add-on had stop working for several months already, and apparently the 

