Like almost everyone else that I know I use Firefox as my browser. It simply has a better set of features that I got used to very easily.
The market statistics say that Firefox holds about 10% of the browser market - if I look at the statistics for the OTN site it is way higher, somewhere around 27% for Firefox - so I'm not alone in this camp.
One of the nice features is the search box at the top right where you can type a word and search it in various search engines.
And now you can get this functionality in JDeveloper too.
Rob just published an extension that adds a search box to JDeveloper. It uses the same set of search plug-ins that you have for firefox.
You can get it from the check-for-update.
And if you are working with XML in JDeveloper you might be interested in his second extension that adds an XPath query tab to every XML file.