I used to love seopen but it would not work with the new version so i had to replace it with 3 other plugins to do tha same job. Then its Informenter that makes all those directory submissions so much quicker and the other one is adsense stats. Appart from that i have around 10 others but i hardly ever use them.
Currently I have the following installed: Google Suggest ColorZilla Tamper Data Add and Edit Cookies Stumble Upon WebDev Toolbar SEOpen webmail compose
SEOpen 0.6.1 works with the new firefox. You need to download it directly from the developer's site. http://seopen.com/firefox-extension/download.php
Iam Currently using Search Status 1.14 Alexa Rank Adsense Notifier Page Rank Indicator. FF is just Superb,cos it shows the adsense stats every 15Minutes.
That Informenter? can this also be customized to fill in custom fields so that you can have for instance keywords and article body and such filled in? Roboform also does this but you need to upgrade to a paid version to get more customfields.
I LOVE StumbleUpon. Such a cool extension, but it can become a major timesink. If you haven't used it, it basically brings you to random cool websites based on your interest when you hit the "Stumble" button that it adds to your browser.
I don't know how I ever got along without always knowing the status of Abe Vigoda... Vesterman does have a Sort Extention that is pretty handy. Sounds like some of you could use it...