Examine source code of Math-e-Matic

{
  "manifest_version": 2,
  "name": "Math-e-Matic",
  "description": "Math-e-Matic detects and solves mathematical equations on the page, showing step-by-step solutions",
  "version": "1.0",
  "icons": {
    "64": "64.png",
    "128": "128.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "64.png",
    "default_title": "Math-e-Matic",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{53ae4277-4151-471f-82d9-7ca9907d4d7e}",
      "strict_min_version": "90.0"
    }
  }
}