myVidster now has a Firefox Add-on for bookmarking videos. This add-on behaves just like the bookmarklet, but is easier to install and use.
Currently the add-on is in the Sandbox and will need a few reviews before it can get approved for public use.
If you would like to beta test and review the add-on all you need to do is:
1. Go to Video Bookmarks Add-Ons page.
2. Sign up for an account (Mozilla requires login for addons that are in the sandbox, sorry)
Please post a quick review on the Video Bookmarks Add-Ons page. This will help in the approval process.