Review for UMTools by Jelmain
Rated 3 out of 5 stars
Do this at your own risk, and backup your data first.
1. xpi files are simply zipped packages usually containing an install manifest file and a java .jar code file.
2. Mozilla installation examines the install file. Open it from winzip, find the ... line and update it.
3. Take a deep breath and see if it still works. Fortunately, Java just ignores anything that's nonsense, so even if it doesn't work, it probably won't do any harm.
To create your own collections, you must have a Mozilla Add-ons account.