"#2 iMacros for Firefox for automating browser tasks and
tests
"This is a very interesting add-on, giving you the ability to
record and play macros in Firefox. Pretty much anything repetitive
you do in Firefox you can automate with iMacros. You can teach it
to fill out forms or download and upload files. It can import or
export data to and from CSV or XML files or databases. It even
includes support for working with PDF files, capturing screenshots,
user agent simulation, and proxies.
iMacros for Firefox also includes a password manager. These
passwords can be used within macros. Plus they can be secured with
256-Bit AES encryption
"#3 Web Developer to design, test, and troubleshoot sites and
applications
"This add-on is great for anyone that designs or maintains
websites or web applications. It gives you a new Firefox menu and
toolbar with various web developer tools. Use it to test, inspect,
or troubleshoot cookies, forms, images, and many other web
components.
"It gives you control over client-side settings by letting you
easily toggle Java, JavaScript, cache, cookies, pop-blocker, and
other features on and off. You can view CSS details and even edit
the style sheets to see live results. It includes many inspection
and manipulation features for forms and images. It also features
code validaters and many other miscellaneous tools."