Any tips other than the Paste Quote?
You can click the find more extensions tab in the Tools|Extensions menu. There are lots of them. Some will appeal to you and some may not. Do a search on Firefox here in APS. There's a whole bunch of threads dedicated to extensions and such.
Another user tip: on the bookmarks menu you will find a "Quick searches" menu. Right click those and look at the properties for each one and you will see a keyword. You can search directly in the address bar by typing keyword followed by what you are looking for. For example type "google firearms" without the quotes into the address bar and hit enter. It will open up google and do a search for the terms you entered.
I know you can do that in the search box at the upper right, but I like keyboard shortcuts so I can Alt-D into the address bar and then just type my search in.
Another great thing about Firefox is built in RSS feeds. When you are on a website that supports RSS feeds, newspapers for example, you will see an orange box with some curved lines in the lower right. Click the icon to bookmark the feed. Then everytime you log on the headlines from that page will appear as a menu of bookmarks in your bookmarks menu. Then just click the headline to go to the story.
So far I like firefox.
After you are totally in love with Firefox, then it's time to check out Thunderbird the matching email client. Then you can dump Outlook/Outlook Express.