Listible’s list of Firefox extensions has been increased to whooping 175 extensions! This list should be a good start to find useful extensions for Firefox, or look for essential ones for beefing up your browser functions.

My top 10 out of this list are (in no particular order):

Tab Mix Plus

Loads of Tab improvements. Changing the behavior of tab opening, focus, closing, mouse events on tab and much more. One of the best tab extensions around!

SessionSaver

“SessionSaver restores your browser -exactly- as you left it, every startup, every time. Not even a crash will phase it. Windows, tabs, even things you were typing — they’re all saved.”

ScrapBook

ScrapBook is a Firefox extension, which helps you to save web pages and easily manage collections. Key features are lightness, speed, accuracy and multi-language support.

CustomizeGoogle

It enhances Google search results by adding extra information (like links to Yahoo, Ask Jeeves, MSN etc) and removing unwanted information (like ads and spam).

Fasterfox

Performance and network tweaks for Firefox.

Forecastfox

Gives a nice weather forecast in the lower right hand corner of Firefox.

SiteAdvisor

Best. Web Safety. Extension. Ever.

They trolled 95% of the world’s web traffic and tested e-mail registration forms with unique e-mail addresses for spam and downloads for spyware.

Mindboggling – and free. =)

Gmail File Space

This extension allows you to use your Gmail Space (2 GB) for file storage. It acts as a remote machine. You can transfer files between your hard drive and gmail. Your gmail account looks like a FTP host and you can upload and download your files.

Foxmarks

Synchronizes bookmarks across multiple machines.

del.icio.us extension

This extension seamlessly integrates your browser with del.icio.us (http://del.icio.us/), the leading social bookmarking service on the Web.

If I missed any that you think are worthwhile please add a comment.

Happy surfing!