Examine source code of Remove Page Titles

{
  "manifest_version": 2,
  "name": "Remove Page Titles",
  "version": "1.4",
  "description": "Firefox web extension to remove the title of any page.",
  "permissions": [
    "<all_urls>",
    "tabs"
  ],
  "background": {
    "scripts": [
      "remove-title.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0948dc04-cbab-42e8-8ee2-15feba5a54a2}"
    }
  }
}