If you use Vivaldi, you can simply invert the colours with the page filters.
I don't think I have Vivaldi. Wait, is that a browser? No, just use Chromium and FF. Linux and Mint, my kids set it up for me, I'll talk to them about it, thanks!! Merry Christmas!
There's a Linux version of Vivaldi, which is based on the Chromium code. vivaldi.com
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