The door is open again and registration available for Weave, Mozilla Labs’ application for synchronizing Firefox metadata online.

To register, visit Weave User Registration site. You only need to provide a valid email address, a password, proof you’re human (thorugh a CAPTCHA test) and click the activation link you will receive by email.

On activation you will be prompted to install the Weave extension (press Allow in the information bar to authorize service.mozilla.com) which is compatible for Firefox 3 Beta 2 and nightlies.

After restarting Firefox, a Weave welcome page will instruct to click on the status bar icon to sign in. On first run, a wizard appears. Step 1 is an introduction to Weave an a warning on the risks of running alpha software. Step 2 backs up your current bookmarks to the selected location and warns to prepare for some data loss. ” Seriously. We are not kidding.”

More Here