This convinces me the author is not knowledgeable about current browser capabilities. They probably haven’t tried anything but Firefox in a long time.
Orion runs desktop (Firefox) extensions on iOS, and is in many ways a breath of fresh air. Instead of parroting “all iOS browsers are Safari” and throwing their hands in the air, they actually got hacking on it.
Edit:
> With adopting the Web Extensions API, we show our support for creating a unified browser extensions experience across all three major web rendering engines. We ended up porting hundreds of APIs, one by one, that were never meant to work with WebKit. Took us a few years, but here we are!
> Orion currently supports about 70% of Web Extensions APIs, and we add more every day. On top of that, we built advanced security features that give our users granular control over extensions, beyond what Chrome and Firefox offer. For example, you can choose to allow an extension to run only on certain websites.