Firefox 4 has a lot of new features (Read Firefox 4 Beta Review | Read Firefox 4 RC Review) which are pretty good. One of the feature which improves tab management in Firefox 4 is the ability to switch to open tabs from the Awesome bar.
This feature allows you to type a URL or title of the page and jump to an open tab instead of opening a new tab. Google Chrome does not have this feature in the current stable version. However, if you are using the development version of Google Chrome or Canary Build of Chrome, you can enable this feature in the browser.
To enable the Open Existing Tab feature in development or Canary build version of Chrome, open a new tab and type about:flags and hit Enter. Now scroll down to the bottom of the page and Enable the feature Focus existing tab on open.
Once you have enabled this feature, Chrome will take you to an existing open tab instead of opening a new tab. This is definitely handy when you have several tabs open and don’t want to search for the tab you are looking for or open another unnecessary tab. Kudos to Mozilla for thinking of this feature.