Is It Compatible? is a Firefox add-on, displays Firefox or Thunderbird compatibility versions for each add-on. Are your addons compatible with the next version of Firefox? With the help of this extension, you can find out straight from the add-ons window.
This addon does exactly one thing: displays Firefox or Thunderbird compatibility versions for each addon in the addons window (Tools Menu -> Add-ons). Works for extensions, themes, and locales.

Requirements:
* Firefox
* Thunderbird

The license of this software is Free, you can free download and free use this browser plug-ins software.