Examine source code of LoremFiller

{
  "manifest_version": 2,
  "name": "LoremFiller",
  "version": "1.2",
  "description": "Insert Lorem Ipsum text into input fields.",
  "icons": {
    "48": "icon5.png"
  },
  "permissions": [
    "contextMenus",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{32930b3c-412c-4a9b-9616-af705cdcde66}"
    }
  }
}