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No More 404s

Developing

This is a "WebExtension". See https://developer.mozilla.org/Add-ons/WebExtensions/Your_first_WebExtension

Develop through the web-ext run command.

npm run dev

How to load a zip or xpi file directly into Firefox

• Upgrade to Firefox 45 or newer
• Visit about:debugging
• Click "Load Temporary Add-on"
• Click "manifest.json"

If something is wrong, it will silently fail. Try removing the add-on, waiting a few seconds, then re-adding.

More info: https://developer.mozilla.org/docs/Tools/about%3Adebugging#Enabling_add-on_debugging

Also:

1. Open new tab.
2. Type "about:config".
3. Enter "xpinstall.signatures.required" in search bar.
4. Modify value to "false" (just click on it).
5. Restart Firefox and try install extension again.

Publishing & Signing

The "web-ext" has a command that publishes and signs the extension at the same time. As far as I can tell, there is no way to do these separately. Once a version is published, it cannot be undone, so use with caution.

First update the version (see Places to Update the version).

# This will sign, publish, and update the ./build directory
npm install
npm run sign

Building an unsigned extension

Only use this if you need to produce an unsigned xpi. Use "run" for development

npm run build_unsigned

Places to update the version

• Changelog.md - update change log
• src/manifest.json - update version
• src/scripts/background.js - update header
• package.json - update header

License

Copyright Internet Archive, 2016 AGPL-3

Credits

• Richard Caceres, @rchrd2
• Greg Lindahl, @wumpus
• Blake Winton, @bwinton, author of https://github.com/bwinton/404archive
• Adam Miller, @adam-miller, author of https://github.com/adam-miller/ChromeNoMore404s