A programmer's diary
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A programmer's diary

Learning to code browser extensions

About the Book

This is a strange book. Somewhere around 2021 (or so) I thought I would like to learn to write browser extensions, with two goals: to make my life easier by customizing my browser (much like I customize Emacs, my editor of choice), and to write a book to help other people learn the same thing (much like I wrote a book teaching how to customize Emacs).

Another idea I had was that it might be an interesting experiment to document my learning process – in other words, write down my thoughts while studying. I already did something similar back in 2016, when I took part in a blogging contest (however strange it may sound), where I learned a new technology and coded an application while blogging about it three times a week for two and a half months.

This book is the result of that experiment. I don’t know if it will be interesting to anyone, but in case you like it, well, you can buy it here. (And if you don’t like it, you can easily get a refund.)

So, join me in my journey learning some new stuff! I can’t promise any enlightening thoughts or brilliant insights, but what I can promise is some ranting, my thoughts on documentation writing (and web extension APIs etc.), and a rant from time to time. Oh, and did I mention rants?

About the Author

Marcin Borkowski
Marcin Borkowski

I am a mathematician, a blogger, a technical writer, a programmer, and an Emacs user. Also, a part of a multi-generational family of geeks, a boardgamer, amateur translator, a former teacher and more.

Table of Contents

    • Introduction
    • The sources
    • Getting started
      • What are extensions?
      • Your first extension
      • Your second extension
      • Anatomy of an extension
      • Example extensions
      • What next?
    • Concepts
      • Using the JavaScript APIs
      • Content scripts
      • Background scripts
      • Match patterns in extension manifests
      • Working with files
      • Internationalization
      • Content Security Policy
      • Native messaging
      • Differences between API implementations
      • Chrome incompatibilities
    • User interface
      • User interface
      • Toolbar button
      • Address bar button
      • Sidebars
      • Context menu items
      • Options page
      • Extension pages
      • Notifications
      • Address bar suggestions
      • devtools panels
    • Howtos
      • Intercept HTTP requests
      • Modify a web page
      • Safely inserting external content into a page
      • Sharing objects with page scripts
      • Add a button to the toolbar
      • Implement a settings page
      • Working with the Tabs API
      • Work with the Bookmarks API
      • Work with the Cookies API

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