The First Plug-in I found is Sxipper. It saves all your info so when you go to another website to do a survey that uses the same kind of survey layout it uses the same info to post on it.
Sxipper is a free Firefox add-on that saves you time by keeping track of an unlimited number of usernames and passwords as well as the personal data you share every day over the web.
* Privacy - Sxipper protects your personal data by keeping it secure on your computer and retrieving it for you when you choose to share it online.
* Simple Set up - No account set up required! Just install, let Sxipper gather data for you, and you're ready to go.
* Passwords - Sxipper remembers your usernames and passwords letting you login with a single click.
* Form Fill - Learning from other users, Sxipper knows how to complete forms with 100% accuracy.
* OpenID - Sxipper recognizes OpenID forms and helps you manage your OpenIDs.
The Second One I found is Check All.
It lets you check all check boxes all at once and speed up survey offers.
Another one is AI Roboform Toolbar for Firefox
Automate Firefox. Record and replay repetitious work. If you love the Firefox web browser, but are tired of repetitive tasks like visiting the same sites every days, filling out forms, and remembering passwords, then iMacros for Firefox is the solution you’ve been dreaming of! ***Whatever you do with Firefox, iMacros can automate it.***
Snap Shots Add-On (for IE and Firefox) 126.96.36.199
Put Snap Shots, the most popular website upgrade in the world, on the sites you visit every day, like Google, Yahoo!, and MSN Live, MySpace, Amazon and Wikipedia, plus blogs and many other sites. Snap Shots Add-On turns their ordinary links into inline videos, photo albums, summaries, member profiles, Wikipedia summaries, stock charts and much more, whenever you mouseover a link. It's fun, it's functional, and it's free.
IE 6, 7 or FF 1.5+ Any Mac OS/Mac OS X/Mac OS 8/9/Any Linux Distribution/Me/NT/2000/XP/2003/vista
Enhanced for: Amazon, AOL Search, Ask Search, Baidu, Blogger, Drudge Report, Google Search, Google Video, Google News, Huffington Post, IMDb, Lycos Search, Metacafe Video, MSN Live Search, MySpace, Marketwatch, Revver Video, Typepad, Veoh Video, Vox, Wikipedia, Xanga Video, Yahoo Search, Netvibes