The new gratis (absolutely
not "FREE") Guide version 3.6 for XP is 172 pages and 2.1 MB PDF,
and my "old" (March 2007) premium verson 3.4 for XP is 211 pages and 11.6 MB PDF.
- but I really didn't bother to further compare the two versions. [Edit: See prev. post from Lashiec]
Contents, gratis version 3.6 (645 x 5523 pixels, 376 KB):
TweakGuides.com - Firefox Tweak GuideContents, "old" premium version 3.4 (645 x 5525 pixels, 351 KB):
TweakGuides.com - Firefox Tweak Guide