Examine source code of IncluVision

{
  "manifest_version": 2,
  "name": "Accessibility",
  "version": "1.0",
  "description": "It changes some features of the page to make it more accessible",
  "homepage_url": "https://github.com/Faristol/firefox-accessibility-extension",
  "permissions": [
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/eye16.png",
    "default_title": "Accessibility",
    "default_popup": "popup/accessibility.html"
  },
  "icons": {
    "16": "icons/eye16.png",
    "48": "icons/eye48.png",
    "128": "icons/eye128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "script.js"
      ],
      "css": [
        "styles.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "faristol_firefox_extension@accessibility.com"
    }
  },
  "web_accessible_resources": [
    "fonts/opendyslexic-regular.ttf",
    "fonts/hyperlegible-regular.ttf",
    "url_key.json"
  ],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y",
        "mac": "Command+Shift+Y"
      },
      "description": "Open popup"
    }
  },
  "background": {
    "scripts": [
      "blockscript.js",
      "blocklist.js"
    ],
    "type": "module",
    "persistent": true
  }
}