I use Firefox as my primary browser and here are some useful links and infonuggets for firefox.
Synchronize Bookmarks with this extension using ftp or webdav.
Have an RSS news aggregator in your browser with Sage. Still undecided if this is better than a standalone aggregator.
Ctrl-L takes you to the location field and ctrl-k to the search bar.
If you are curious about what is in your cache enter about:cache in the location bar.