Completely agree with the compliments previously posted. Rated 5 out of 5 stars
I actually install this first every time I create a new profile (followed immediately by Tab Mix Plus). It handles so much and gives me great flexibility when added to whatever new features the latest Fx upgrade brings.
btw--in recent versions I find that clicking to see which sites I have given permission to install does not work anymore. (I run WinXP Pro on Athlon64 at about 2GHz. It always worked before; don't know what changed but I haven't seen anyone refer to this on the forums.)
There are numerous great MR Tech add-ons but this one is king. Thanks Mel.