Author Topic: Fix: "libavcodec may be vulnerable..." (Firefox 50 + Peppermint 6)  (Read 1575 times)

0 Members and 1 Guest are viewing this topic.

Offline Capivara

  • Member
  • ***
  • Posts: 186
  • Karma: 62
  • Devoted To Daemons & Penguins
    • View Profile
  • Peppermint version(s): 6, 7
To the best of my knowledge this is only an issue with Peppermint 6 and Firefox 50.

FF 50 users will notice the following warning on many websites: "libavcodec may be vulnerable or is not supported, and should be updated to play video."

What it means: Libavcodec versions older than 54.35.1 will be blocked by Firefox due to security concerns. Ignoring the message will sometimes work, sometimes not.

How to fix it:

Open Terminal and type the following commands:

Code: [Select]
sudo add-apt-repository ppa:heyarje/libav-11
sudo apt-get update
sudo apt-get install libav-tools
sudo apt-get upgrade

Press 'Y' (Yes) if the installer asks you about replacing old files.

A reboot is recommended afterwards.
If you like Linux, raise your hand. If you don't, raise your standards.


  • Member
  • ***
  • Posts: 986
  • Karma: 311
    • View Profile
  • Peppermint version(s): Peppermint Six (x64)
Re: Fix: "libavcodec may be vulnerable..." (Firefox 50 + Peppermint 6)
« Reply #1 on: November 21, 2016, 04:09:23 pm »
In addition to Capivara:

If you can not update to a newer version (dependencies), type "about:config" in the url bar and search for "media.libavcodec.allow-obsolete", right click on it and choose "Toggle". This will set the Value to true. Restart Firefox, it will now use the old libavcodec-version without protesting...

Greets!  ;)
Peppermint 6  (x64)   -   Windows 7 Ultimate SP1  (x64)
Running different OS flavors in VirtualBox, just for fun!

Offline PCNetSpec

  • Administrator
  • Hero
  • *****
  • Posts: 26452
  • Karma: 65531
  • "-rw-rw-rw-" .. The Number Of The Beast
    • View Profile
    • PCNetSpec
  • Peppermint version(s): Peppermint 10
Re: Fix: "libavcodec may be vulnerable..." (Firefox 50 + Peppermint 6)
« Reply #2 on: November 21, 2016, 04:59:12 pm »
Nice one guys :)
WARNING: You are logged into reality as 'root' .. logging in as 'insane' is the only safe option.

Team Peppermint