Examine source code of TwitterTweetFilter_WebExt

{
  "manifest_version": 2,
  "name": "TwitterTweetFilter_WebExt",
  "version": "1.5resigned1",
  "description": "Hide tweets including specified words. (WebExtension)",
  "content_scripts": [
    {
      "matches": [
        "https://twitter.com/*",
        "https://twitter.com/search?*"
      ],
      "js": [
        "jquery-3.1.1.min.js",
        "contents.js"
      ]
    }
  ],
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4cd75943-df25-4c45-92ce-c69843a58231}"
    }
  }
}