Examine source code of Memespeech

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "developer": {
    "name": "Obsessive Media LLC",
    "url": "https://www.obsessivefacts.com"
  },
  "version": "1.0.1",
  "default_locale": "en",
  "applications": {
    "gecko": {
      "strict_min_version": "57.0"
    }
  },
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "storage"
  ],
  "icons": {
    "32": "icons/logo-32.png",
    "48": "icons/logo-48.png",
    "64": "icons/logo-64.png",
    "96": "icons/logo-96.png",
    "128": "icons/logo-128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16-sharp.png",
      "19": "icons/icon-19.png",
      "32": "icons/icon-32.png",
      "38": "icons/icon-38.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "__MSG_extensionName__",
    "default_popup": "html/popup.html"
  }
}