You can actually run Adobe Flash on Pale Moon :)

Yes, you read the title correctly. You can still run most versions of Adobe Flash in the Pale Moon browser. However, version 32.0.0.371 is the very last version of the official Adobe Flash Player you can still run on it as later versions all have the kill switch which activated on 1/12/2021 (rendering those versions unusable) and if you download it, you should make sure to check "never check for updates" while you're setting it up to keep it running infinitely.

Download Link :)

I tested it out and it can run every Flash game I've tried so far using the official Flash player. This also makes me wonder if it would be possible to run Shockwave on Pale Moon and where to download a copy of it at, especially given how it's also a NPAPI plugin just like Flash.