High Sierra Mac 2011 video

Servant of Cats wrote:

I do not know if Firefox 115 ESR is enough to view current Internet videos.

I have no problems viewing streaming video on my MBP running High Sierra with Firefox ESR 115.

115.20.0 is the latest release (Feb 7, 2025)

ESR releases are available here -> https://www.mozilla.org/en-US/firefox/all/desktop-esr/

lol likely not flash players

if it was me then I would try looking for firefox they support older macOS version

Download Mozilla Firefox for Mac — Fast, Private & Free - from Mozilla

The version of Firefox that Mozilla distributes for High Sierra is an older version – Firefox 115 ESR. It hasn't gotten new features in some time. It was supposed to stop getting "critical security updates" last September or October, but Mozilla gave it a reprieve, and now it is scheduled to stop getting them in March.

I do not know if Firefox 115 ESR is enough to view current Internet videos.

Do you mean ALL video? What about saved videos on your Mac? Have you tried YouTube? What about video adverts, e.g. in Facebook?

I use a 2011 iMac and can play all video even in Mavericks (except DRM, where I have to use a High Sierra VM).

FYI, Adobe discontinued Flash Player on December 31, 2020. They actively blocked content from running in the latest versions of Flash Player starting on January 12, 2021.