Examine source code of EasyProxy

{
  "manifest_version": 2,
  "name": "EasyProxy",
  "version": "5.7",
  "description": "Simple proxy switcher. Tab proxy support.",
  "icons": {
    "32": "img/32-regular.png",
    "48": "img/48.png",
    "128": "img/128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "tabs",
    "proxy",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": "img/32-off.png",
    "default_title": "EasyProxy",
    "default_popup": "popup/index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "easyproxy@martini-drinker",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}