I just got a message telling me that Privacy badger is an unreputable browser addon and i know alot of people here use it and wondering if this detection by avast is legit.
I personally use Privacy Possum which doesn’t alert and has a much better rating.
You don’t need to take my word for that: https://malwaretips.com/threads/privacy-possum-is-privacy-badger-on-steroids.83047/
I don’t have a direct answer to your question.
I personally use Privacy Possum which doesn't alert and has a much better rating.
Where?
On AMO (https://addons.mozilla.org/Firefox/), Privacy Badger has 559,804 users (and is produced by the well-respected EFF) and a rating of 4.7 Stars, Privacy Possum has 43,618 users and a rating of 4.4 Stars.
Depends on what and who you trust. 
https://forum.avast.com/index.php?topic=218832.msg1461632#msg1461632
Well I use Avast Secure Browser in the new year,
polonus
As do I but, I also have the Privacy Possum running in the background.
https://screencast-o-matic.com/screenshots/u/Lh/1537309413023-2639.png