I’ve just started using two indispensable Firefox extensions:
Highlighter – What it does: select a block of text, right-click and select “highlight”. Very nice when trying to pull out interesting bits. Also has several other useful features like instant highlighting when you select text, tracker icons for jumping back to highlighted sections, and the ability to select different highlight colors.
SessionSaver – This extension saves everything you were viewing when you closed Firefox, so when you come back to the computer you can read where you left off. You can also do cool stuff like sync your session to a previous session over FTP, or even back up a session to a file. Feature list.