I use Firefox regularly and am quite happy with its feature set and extensibility. There are a few options that I change to enhance my experience and security. These are:
- Domain guessing
- Internet keywords
- Keyworded bookmarks
I turn off Domain guessing and Internet keywords; and instead use Keyworded bookmarks extensively. Accessing two of these settings requires entering about:config in the address bar. This provides direct access to Firefox’s configuration settings but is not recommended for novices. Learn more on about:config. When you are done with your settings just close the window/tab displaying about:config.