Power Twitter 2.02.1-signed
Makes Twitter Better!
This add-on is not compatible with your version of Firefox because of the following:
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With the release of Firefox 3.5, Power Twitter is now VERY fast so prior comments regarding any lag issues do not apply.
Power Twitter v1.51 is compatible with #newtwitter and again increases speed and caching.
To create your own collections, you must have a Mozilla Add-ons account.