v8.2 beta minor update for Firefox

[paulrouget]

Addon version: v8.2.0.18a1

Now when we encounter VP9 content with non Opus/Vorbis audio, MKV format is selected instead of WebM. Fixing some issues on youtube and UHD content.

[paulrouget]

This is a false positive., anybody can verify this, the code is Open Source: https://github.com/aclap-dev/vdhcoapp/ - Avast is flagging the CoApp wrongly.

Also, Agent-AIU is a Windows thing. You're on Mac.

And if anyone is worried, the app is verified by apple. Here is how you can verify:

• open a terminal
• run: codesign -d -vvv /Applications/net.downloadhelper.coapp.app

You'll see that the app has been verified by Apple:

Authority=Developer ID Application: ACLAP (4YP9AW3WW3)
Authority=Developer ID Certification Authority
Authority=Apple Root CA