Examine source code of PSPTools

{
  "manifest_version": 2,
  "name": "Grupo Vip Downloads",
  "description": "Sistema de Downloads Grupo Vip",
  "version": "1.0.4",
  "icons": {
    "16": "imgs/icon16.png",
    "48": "imgs/icon48.png",
    "128": "imgs/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.pngtree.com/*",
        "https://*.freepik.com/*",
        "https://*.envato.com/*",
        "https://*.audioblocks.com/*",
        "https://*.videoblocks.com/*",
        "https://*.storyblocks.com/*"
      ],
      "js": [
        "src/grupovip.js"
      ]
    }
  ]
}