After the last auto update Vivaldi (5.0.2497.30) will not play any HTML5 proprietary media. Vivaldi says my OS (Ubuntu 16,04) is obsolete and I must upgrade. They cannot provide a fix so I want to role back to the previous version. They gave me links to the archived versions but what would be the best way to install?
I wasn’t able to upgrade Ubuntu until I removed 3rd party software , ppas etc, So have held back until I’m sure I have everything fully backed up. Afraid of losing stuff if things go wrong.
In the meantime I’d like to install an archived version from this list: [https://vivaldi.com/download/archive.]
The best appears to be vivaldi-stable_4.3.2439.71-1_amd64.deb
Which I think was my last working version.
So what steps do I take to remove the current version and install the older one?
Any advice greatly appreciated.
Hope my post is acceptable - read FAQs but cannot follow the posting template.