If latest Flash plugin(.425) isn't working in Firefox, this is the solution.

duffman · 12-16-2014, 12:29 AM

Even though I had the latest Flash plugin installed, Firefox still reported it as deactivated.
Simple solution, not always obvious.

Delete your local cache folder '.mozilla' (rm -rf ~/.mozilla)

BUT make sure to at least backup your bookmarks first.
(Show All Bookmarks->Import and Backup->Export Bookmarks to HTML)
You will also have to redownload Add-ons like Adblock, but that takes a minute.

As a general rule, it's a good idea to delete this folder whenever you update Firefox or in weird cases like this.

brianL · 12-16-2014, 02:57 AM

Never had any problems here, using the package from Alien Bob:
http://www.slackware.com/~alien/slac...player-plugin/

stevelipinski · 12-18-2014, 06:54 AM

Deleting the entire ~/.mozilla directory is a bit harsh.

The following was less intrusive for me (after updating the flashplugin package - in my case via Arch yaourt):
rm ~/.mozilla/firefox/*.default/pluginreg.dat
<then restart firefox>

All was well and Firefox was recognizing the updated version of flash....
No reinstall of addons and such necessary either.

duffman · 12-20-2014, 01:18 AM

Indeed, I'll make sure to remember that.