InsaneJournal

Okay, I'm asking here in an actual post, since I'm not sure how many people are still going into the previous ones to offer their advice. I want to like Firefox 4, I really do! I just have a few concerns, I'm hoping I can get them cleared up here! Thank you so much in advance! Here's some cute owls for your time.

Okay first of all, LJ-hook. It doesn't work, and there's a comment here about downloading an .xpi file or something? Which is all well and good but... I have no idea how to do that, so maybe that could help someone a little smarter than me figure out how to fix it for us? Or create a tutorial (I'll give you cookies!)? And if not that, then does anyone have suggestions on randomizing icons? I tried Livejournal add-ons and followed the tutorial here, even tried restarting my computer afterward, but it didn't work for me, so I think that's out.

Also, I believe it was actually my LJ-hook that did this for me, but does anyone know of an add-on that will work that'll do a mass check/uncheck all? That thing was a LIFESAVER when it came to redoing icons and removing lots of friends at once, and I NEED it in my life. Relatedly, since I'm new to the whole greasemonkey thing, any good tutorials/tips on scripts for that?

And lastly, I've got the version straight from the website, so I'm sure it's the most recent one, but for some reason, I don't have all the options mentioned here when I click on a tab. I have everything except "Move to Group" and "Rename this tab...", and I have no idea why. I think that feature could come in handy for me, so I'd like to solve it!