Examine source code of memegen - meme generator

{
  "name": "memegen",
  "description": "meme generator extension",
  "version": "2.2.0",
  "manifest_version": 2,
  "icons": {
    "16": "memegen.webp",
    "48": "memegen.webp",
    "128": "memegen.webp"
  },
  "browser_action": {
    "default_popup": "src/popup.html"
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ca12697e-dce8-4a44-8c0b-14b74dad069c}"
    }
  }
}