A Brief History of Browser Extensibility
medium.com
medium.com
Aaron Boodman saw that idea and took it much farther by developing Greasemonkey, which made the idea more general and more powerful.
I've worked with the Insight [1] folks (YC W19, I think?) to port my Chrome extension [2] to their platform. They made it super easy, and I'd recommend others give them a try. Not every extension makes sense on iOS, but for those that do, this can be a slick way to finally reach iOS users.
Hopefully Insight can popularize mobile extensions and generate some competition in the mobile browser space!
1: https://www.insightbrowser.com
2: https://chrome.google.com/webstore/detail/beeline-reader/ifj...
I'll also be attempting to update the augmented browsing/browser extension Wikipedia page in the coming weeks