List of my favorite Firefox 3.6.x compatible extensions:


Extension Official Page
add_bookmark_here2-3.6.20100302 link
adblock_plus-1.1.3 link
bugmenot-2.2 link
copy_link_name-1.3.1.1 link
copy_plain_text-0.3.3 link
copyurlplus-v1.3.4 link
cutemenus_-_crystal_svg-1.9.3 link
dictionarysearch-3.6.2 link
downthemall-1.1.8 link
extended_statusbar-1.5.4 link
firebug-1.5.3 link
flashblock-1.5.14.2 link
flagfox-4.0.3 link
flashVideoReplacer-1.0.5 link
gmail_manager-0.6 link
gtranslate-0.7 link
jsview-2.0.5 link
menu_editor-1.2.6 link
pencil-1.0.6 link
permit_cookies-0.6.2 link
printpdf-0.76 LIN - printpdf-0.76 WIN link
read_it_later-2.0.3 link
regular_expressions_tester-3.0 link
right-click-link-1.1.3 link
sendtophone.0.9.2 link
shorten_url-0.3.5.1 link
sqlite_manager-0.6.5 link
tab_mix_plus-0.3.8.2 link
titlebar_tweaks-1.8.0 link
too_many_tabs-1.1.5 link
user_agent_switcher-0.7.2 link
video_downloadhelper-4.7.1 link
web_developer-1.1.8 link