I love Mozilla's (and it's kin) ability for tabbed browsing. What I really miss is the ability to load externally requested pages in a new tab rather than opening a new window. Chimera offers this ability, and I love Chimera but because of some proxy irregularities, it's more cumbersome to use than Mozilla (which isn't much better for changing proxy configs).
However, browsing the Chimera prefs.js file I noticed a particular user_pref line:
user_pref("browser.always_reuse_window", true);I added that line to my Mozilla:user.js file (in the same directory as the prefs.js file, ~/Library -> Mozilla -> Profiles -> Username -> [random].slt), restarted Mozilla and woila! External requests now load in the active tab. Mozilla doesn't create a new tab but hey, at least it doesn't create a new window!
Mac OS X Hints
http://hints.macworld.com/article.php?story=2002111905182183