Examine source code of Remove Tweet Views

{
  "manifest_version": 2,
  "name": "RemoveTweetViews",
  "version": "1.0",
  "description": "Removes the view counter from tweets",
  "icons": {
    "16": "bitmap.png",
    "32": "bitmap.png",
    "48": "bitmap.png",
    "128": "bitmap.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*"
      ],
      "js": [
        "jquery.min.js",
        "removeviews.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0a25b30a-072c-4fc4-a6f7-cbc5d910c50a}"
    }
  }
}