Examine source code of Access Tab

{
  "manifest_version": 2,
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "author": "Pacifique Rukiza",
  "default_locale": "en",
  "version": "2.8.4",
  "permissions": [
    "tabs",
    "idle",
    "alarms",
    "storage",
    "unlimitedStorage",
    "activeTab",
    "<all_urls>",
    "webNavigation",
    "theme",
    "contextMenus"
  ],
  "background": {
    "page": "src/firefox/background.html",
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ],
      "js": [
        "inject/loader.js"
      ],
      "exclude_matches": [
        "*://*.google.com/webstore*",
        "*://*.mozilla.org/addons*",
        "*://addons.mozilla.org/*"
      ],
      "all_frames": false,
      "run_at": "document_start",
      "match_about_blank": false
    },
    {
      "matches": [
        "http://*/*",
        "https://*/*",
        "file://*/*"
      ],
      "js": [
        "inject/fab-manager-firefox.js"
      ],
      "css": [
        "inject/inject-style.css"
      ],
      "exclude_matches": [
        "*://*.microsoftedge.microsoft.com/*",
        "*://*.microsoft.com/*edge*",
        "*://*.google.com/webstore*",
        "*://*.mozilla.org/addons*",
        "*://*.microsoft.com/addons*",
        "*://*.opera.com/addons*",
        "*://*.youtube.com/live_chat*",
        "*://addons.mozilla.org/*"
      ],
      "all_frames": false,
      "run_at": "document_end",
      "match_about_blank": false
    }
  ],
  "web_accessible_resources": [
    "assets/*",
    "config/*",
    "config/content-filters.json",
    "inject/*",
    "inject/inject-style.css",
    "utils/*",
    "libs/*",
    "src/block.*",
    "src/index.html",
    "src/style.css",
    "icons/*",
    "inject/note/content/content.css",
    "inject/note/content/brawse-note.js",
    "inject/note/utils/libs/css/materialdesignicons.min.css",
    "inject/note/utils/libs/fonts/materialdesignicons-webfont.woff2",
    "inject/note/utils/libs/fonts/materialdesignicons-webfont.woff",
    "inject/note/utils/libs/fonts/materialdesignicons-webfont.eot",
    "inject/note/utils/libs/font/*",
    "inject/note/ui/*"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/logo16.png",
      "48": "icons/logo48.png",
      "128": "icons/logo128.png"
    },
    "default_title": "Access Tab",
    "browser_style": true
  },
  "icons": {
    "16": "icons/logo16.png",
    "48": "icons/logo48.png",
    "128": "icons/logo128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5075d206-09c2-4a98-a70f-ab079d87154c}",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ]
      }
    }
  },
  "commands": {
    "toggle_dictionary": {
      "suggested_key": {
        "default": "Ctrl+Shift+U",
        "mac": "Command+Shift+U"
      },
      "description": "Toggle the dictionary feature"
    },
    "toggle_notes": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y",
        "mac": "Command+Shift+Y"
      },
      "description": "Toggle the notes feature"
    }
  }
}