The extension API changed (web extensions). The plugin API is still NPAPI. There was a project to replace the API with the one that chrome uses, which has better sandboxing, but eventually they abandoned that project.

My memory may be faulty, but my recollection is there was never a serious attempt to replace NPAPI with Pepper. It was looked into, but it was concluded that the Pepper APIs were too tightly bound to Webkit's implementation to make it possible to implement, and Mozilla instead built their own out-of-process sandbox (which was sorely needed because Flash crashes were the single largest cause of Firefox crashes).

This is the project I was referring to: https://wiki.mozilla.org/index.php?title=Mortar_Project&oldi...

Chrome has deprecated Pepper, hasn't it?

Major browsers can't ditch Flash until Adobe EOLs it. Too many legacy enterprise apps still rely on it, even though they are likely being frantically reimplemented this month. I'm in that boat.

> Major browsers can't ditch Flash until Adobe EOLs it.

Adobe announced EOL a long time ago. January 12th is the day it will stop working, regardless of browser support.

A website my kids school use for maths advises it will stop worrying except for with Google Chrome, so I assume Google is keeping their flash implementation, and so flash will keep working.

That web site is wrong. The Flash player in Chrome will stop working on January 1st, and it will be removed from the browser entirely in an update early next year.

https://www.chromium.org/flash-roadmap

https://www.adobe.com/products/flashplayer/end-of-life.html

My wife's school is in the same boat except they've been told they are SOL and they need to find replacements.

Enterprises that still rely on legacy Flash apps can pay Adobe partner Harman for a custom standalone Flash host application:

https://services.harman.com/partners/adobe

Adobe, Mozilla, Google, Microsoft, and Apple simultaneously announced back in 2017 that Flash would no longer be supported after 2020:

https://developer.mozilla.org/en-US/docs/Plugins/Roadmap#See...

Depreciation in Firefox isn't going to cause that much corporate pressure to finally rewrite those ancient flash apps. When Internet Explorer drops it then they have a problem.

According to adobe the plugin will stop loading content in January regardless of the browser

If IE and Windows are running the extension then I guess IE can tell it the date is anything it wants?

Microsoft seems to have mostly abandoned IE so hopefully it won't come to that.

Hopefully adobe was smart enough to prevent that