Examine source code of Is In Stock

{
  "manifest_version": 2,
  "name": "Is In Stock",
  "description": "Is In Stock is your ultimate shopping superpower.",
  "permissions": [
    "storage",
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "garrett@isinstock.com",
      "strict_min_version": "112.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "content_scripts/content_script.js"
      ],
      "run_at": "document_start",
      "match_about_blank": false,
      "all_frames": false,
      "exclude_matches": [
        "*://*.amazon.com/*",
        "*://*.bestbuy.com/*"
      ],
      "matches": [
        "http://*/*",
        "https://*/*"
      ]
    },
    {
      "js": [
        "content_scripts/amazon.js"
      ],
      "run_at": "document_start",
      "match_about_blank": false,
      "all_frames": false,
      "matches": [
        "*://*.amazon.com/*"
      ]
    },
    {
      "js": [
        "content_scripts/bestbuy.js"
      ],
      "run_at": "document_start",
      "match_about_blank": false,
      "all_frames": false,
      "matches": [
        "*://*.bestbuy.com/*"
      ]
    }
  ],
  "icons": {
    "16": "images/logos/isinstock/16.png",
    "24": "images/logos/isinstock/24.png",
    "32": "images/logos/isinstock/32.png",
    "48": "images/logos/isinstock/48.png",
    "64": "images/logos/isinstock/64.png",
    "128": "images/logos/isinstock/128.png"
  },
  "web_accessible_resources": [
    "images/**/*",
    "elements/**/*"
  ],
  "version": "0.1.5"
}