If you are a Firefox 3.6 user, you must have noticed that new tabs are now opening right next to the current tab. All previous Firefox versions were opening new tabs as the rightmost tab (on the far right of the tab bar). As far as I remember Google Chrome browser introduced this nifty idea first (although it’s not implemented exactly like that), and Firefox just followed.
I personally like it, although I have to get used to it, sometimes I am still looking on the far right to find the new tab.
For those of you who would like to retain the old style behavior, have a look at the following instructions:
1. Type on your browser’s address bar: “about:config”
2. Press the “I’ll be careful …” button.
3. Scroll down to the “browser.tabs.insertRelatedAfterCurrent”
4. Double-click on it to set its value to “false”
5. Enjoy, there is no need to restart Firefox