Examine source code of CVE Tooltip

{
  "name": "CVE Tooltip",
  "version": "0.0.2",
  "manifest_version": 3,
  "author": "Sebastian Schicho",
  "description": "Add a tooltip for CVE identifiers on any webpage. Hover over CVE identifiers to get a synopsis of the vulnerability.",
  "icons": {
    "32": "icons/cve32.png",
    "48": "icons/cve48.png",
    "96": "icons/cve96.png",
    "128": "icons/cve128.png"
  },
  "permissions": [
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{292ca356-be27-4972-a23b-8eb08c46c3e9}"
    },
    "gecko-android": {}
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "cvetooltip.js"
      ],
      "run_at": "document_start"
    }
  ]
}