Installing custom addon in firefox

firefox-addon.md

1. Disabling signing required in config

• Type - about:config in address bar and press enter.
• Search for xpinstall.signatures.required and double click to disable

2. Signing addon file

• First select all addon files and convert to .zip file and rename extension to .xpi
• Initialize the nodejs project in your computer using command npm init.
• Install sign-addon package using command npm install sign-addon.
• Now use below NodeJS script to sign addon (to get API secret and API key, visit - https://addons.mozilla.org/en-US/developers/addon/api/key/

var { signAddon } = require('sign-addon');

signAddon({
  // Required arguments:

  xpiPath: '/path/to/your/addon.xpi',
  version: '0.0.1',
  apiKey: 'Your JWT issuer',
  apiSecret: 'Your JWT secret',

  // Optional arguments:

  // The release channel (listed or unlisted).
  // Ignored for new add-ons, which are always unlisted.
  // Default: most recently used channel.
  channel: undefined,
  // Save downloaded files to this directory.
  // Default: current working directory.
  downloadDir: undefined,
  // Number of milliseconds to wait before aborting the request.
  // Default: 15 minutes.
  timeout: undefined,
  // Optional proxy to use for all API requests,
  // such as "http://yourproxy:6000"
  // Read this for details on how proxy requests work:
  // https://github.com/request/request#proxies
  apiProxy: undefined,
  // Optional object to pass to request() for additional configuration.
  // Some properties such as 'url' cannot be defined here.
  // Available options:
  // https://github.com/request/request#requestoptions-callback
  apiRequestConfig: undefined,
  // Optional override to the number of seconds until the JWT token for
  // the API request expires. This must match the expiration time that
  // the API server accepts.
  apiJwtExpiresIn: undefined,
  // Optional override to the URL prefix of the signing API.
  // The production instance of the API will be used by default.
  apiUrlPrefix: 'https://addons.mozilla.org/api/v4',
})
  .then(function (result) {
    if (result.success) {
      console.log('The following signed files were downloaded:');
      console.log(result.downloadedFiles);
      console.log('Your extension ID is:');
      console.log(result.id);
    } else {
      console.error('Your add-on could not be signed!');
      console.error('Error code: ' + result.errorCode);
      console.error('Details: ' + result.errorDetails);
    }
    console.log(result.success ? 'SUCCESS' : 'FAIL');
  })
  .catch(function (error) {
    console.error('Signing error:', error);
  });

• Now just drag and drop the signed xpi file in Firefox to install.