Hi cwalsh1223,

The KA Extension was not built, offered, or maintained by Khan Academy. 

Sorry I couldn't be of more help! 

Based on the recent changes to the github repository, it seems like KA removed it for copyright reasons. You can still re-enable it in your browser's extension settings.

Electric Dolphin ⚡️🐬 In my browser it says it "violated the web store policy". Maybe it changed? (I use Brave at home)

It deleted automatically for me. Is it unsafe, or does it contains malware?

Seems like it came back and rebranded as "Extension for Khan Academy"