Adding and managing new extensions became easier than ever before with Firefox 3. You could simply type in your query in a search box, or simply pick an add-on from the “recommended” list.

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Experimental add-on AST (Add-ons Suggestions Tool) goes a step further by suggesting add-ons that other Firefoxians (err??) use in conjunction with your add-ons. Installing the suggested add-ons is very convenient as well, just press the “Install addon” button on AST’s window. Else you can use the “Get add-ons” feature to install all those add-ons automatically <this can be a bit overwhelming for Firefox though!>.

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As said, AST is still experimental and you’ve to check the “Let me install this add-on” box in order to download it.

Get AST for Firefox