Source: https://toddschiller.com/pages/extensions.html

# Extensions

As work has shifted to the browser, browser extensions became the most powerful vehicle for permissionless
innovation and malleable software. At [PixieBrix](https://www.pixiebrix.com/), we ship an
enterprise-grade extension for customizing and automating the web applications you already use.

I track the broader shifts in what people can customize and extend in a
weekly roundup, [This Week in
Extensibility](https://toddschiller.com/pages/extensibility.html).

## Read in this order

- [A brief history of browser extensibility](https://toddschiller.com/blog/history-browser-extensibility.html)

  How the major browsers arrived at the extension models they
  ship today.
- [The PixieBrix manifesto: web customization for the masses](https://toddschiller.com/blog/pixiebrix-manifesto.html)

  Why I think the next decade of work software is shaped in
  the browser layer, not the SaaS layer.
- [7 bite-sized tips for reliable web automation and scraping selectors](https://toddschiller.com/blog/reliable-web-scrapers.html)

  Practical rules for selectors that don't break the next time
  someone touches the page. Short and share-able.
- [Making AI coding work for enterprise-grade browser extensions](https://toddschiller.com/blog/ai-coding-browser-extensions.html)

  Lessons from building PixieBrix with AI coding tools across
  content scripts, background workers, and React UI. Pairs
  with my
  [AI Coding Summit 2026 talk](https://gitnation.com/contents/making-ai-coding-work-for-enterprise-grade-browser-extensions).

## Related projects

- Chrome Extension

  [PixieBrix](https://chromewebstore.google.com/detail/pixiebrix/mpjjildhmpddojocokjkgmlkkkfjnepo)

  Enterprise-grade extension for customizing and automating
  the web applications you already use.
- Chrome Extension

  [Agent Browser Shield](https://github.com/pixiebrix/agent-browser-shield)

  Source-available extension to protect AI agents while they browse the web.

## Everything else

Full chronological list:
[Browser Extensions category](https://toddschiller.com/category/browser-extensions.html).