Responding to post 21
@TBest I used Lichess TV to test the site sound. Not every browser behaves the same or had the speaker icon on the left or right of the web page tab. Uniformity having it on the left would have been good. I don't think new users will know or play with the setting to get site sounds.
Chromium Browser, Version 103.0.5060.134 (Developer Build, ungoogled-chromium) (64 bits)
Lichess Sound (On); Short-cut Ctrl+M (Not working); Tab speaker Icon (Visible / Not Clickable/)
Google Chrome, Version 115.0.5790.110 (Official Build) (64-bit)
Lichess Sound (On); Short-cut Ctrl+M (Not working); Tab speaker Icon (Visible / Not Clickable/)
Opera One(version: 101.0.4843.25)
Lichess Sound (On); Short-cut Ctrl+M (Not working); Tab speaker icon (Visible beside the Lichess icon tab / Clickable: Mutes & Enables sound)
Cent Browser, Version 5.0.1002.354 (Official Build) (32-bit) (Portable) (Chromium 102.0.5005.167)
Lichess Sound (On); Short-cut Ctrl+M (Not working, Opens new tab); Tab speaker icon (Visible / Clickable: Mutes & Enables sound)
Mozilla Firefox Browser, Version 115.0.2 (64-bit)
My Desktop Autoplay default was set to Block audio. So I saw the red icon on the right of the screen.
Pressed keys: Ctrl+i
Click Permissions tab
Auto Play Unselected: Use Default (Not in the steps)
lichess.org/faq#autoplaySelected: Allow Audio and Video
Now the sound is constantly on and the red speaker icon gone. Was the only browser I saw the red icon.
Sound (Now On); Short-cut Ctrl+M (ok); Tab speaker icon (Visible & Replaces the Lichess icon when mouse hover over it / Clickable: Mutes & Enables sound)
Microsoft Edge, Version 115.0.1901.183 (Official build) (64-bit)
Lichess Sound (On); Short-cut Ctrl+M (Not working); Tab speaker icon (Visible beside the Lichess icon tab / Clickable: Mutes & Enables sound)
Epic Privacy Browser, Version 104.0.5112.81 (Official Build) (32-bit)
Lichess Sound (No sound, Videos work with sound, not the game pieces); Short-cut Ctrl+M (Not working); Tab speaker icon (Not visible / Not Clickable)
UR, Version 108.1.5359.9 (BETA) (64-bit)
Lichess Sound (On); Short-cut Ctrl+M (Not working); Tab speaker Icon (Visible / Not Clickable/)
AVG Secure Browser, Version 114.0.21608.200 (Official Build) (64-bit)
Lichess Sound (On); Short-cut Ctrl+M (Not working); Tab speaker Icon (Visible / Not Clickable/)
I did not test all the ones mention in this link....
windowsreport.com/best-browser-windows-10/I dislike subject titles like: Vote to assassinate ...