Examine source code of Photo Adjuster Lite

{
  "manifest_version": 2,
  "name": "Photo Adjuster Lite",
  "version": "1.0",
  "description": "Apply visual filters to all images on the page.",
  "icons": {
    "64": "icon64.png",
    "128": "icon128.png"
  },
  "permissions": [
    "activeTab",
    "tabs"
  ],
  "browser_action": {
    "default_title": "Image Filter",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{4c4ab394-93cb-4713-9d31-90296fbea90d}",
      "strict_min_version": "117.0"
    }
  }
}