I understand that Chrome has chromify-osd, an extension that lets it use notify-osd for notifications. Is it possible to customize it such that it works for Firefox as well?
There is a script made by Marco Ceppi and modified by George Edison that allows Firefox to use Notify-OSD.
For Firefox to use Notify-OSD, you need to have Greasemonkey extension installed in Firefox. After that, you need to download this script.
You also have to download NPAPI plugin and copy them to your
After all that, run the following command in a terminal:
You now should have Firefox using Notify-OSD for displaying notifications.
The short answer is: no.
A slightly longer answer is that Chrome extensions will not work with Firefox, and vice-versa. You can however look for a Firefox extension that does more or less the same job, but I haven't heard of one similar to chromify-osd.