Examine source code of F_U Paste Me

{
  "manifest_version": 2,
  "name": "F_U Paste Me",
  "version": "0.92.1",
  "description": "Paste wherever the f_ck you want",
  "author": "Haroun B.",
  "icons": {
    "16": "./icons/f_u-paste-me-16.png",
    "32": "./icons/f_u-paste-me-32.png",
    "48": "./icons/f_u-paste-me-48.png",
    "128": "./icons/f_u-paste-me-128.png"
  },
  "permissions": [
    "clipboardRead",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content-script.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "./icons/f_u-paste-me-16.png",
      "32": "./icons/f_u-paste-me-32.png",
      "48": "./icons/f_u-paste-me-48.png",
      "128": "./icons/f_u-paste-me-128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b0027a8a-4121-4e3c-9e24-6d59824ff1a5}"
    }
  }
}