Examine source code of HTMLFilter

{
  "manifest_version": 2,
  "name": "HTMLFilter",
  "version": "2.1resigned1",
  "author": "Baptiste Thémine",
  "homepage_url": "https://github.com/Baptistou/HTMLFilter",
  "description": "__MSG_@manifest_description__",
  "default_locale": "en",
  "permissions": [
    "<all_urls>",
    "contextMenus",
    "storage"
  ],
  "icons": {
    "16": "images/icon16.png",
    "32": "images/icon32.png",
    "48": "images/icon48.png",
    "64": "images/icon64.png"
  },
  "background": {
    "scripts": [
      "functions.js",
      "webext.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "content/custom.css"
      ],
      "js": [
        "functions.js",
        "webext.js",
        "content/script.js"
      ]
    }
  ],
  "browser_action": {
    "default_title": "HTMLFilter (OFF)",
    "default_icon": "images/icon-read.png"
  },
  "options_ui": {
    "page": "settings/index.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3f6baa18-9fba-4803-bf29-252bb7503fd9}"
    }
  }
}