Examine source code of Inline PDF

{
  "manifest_version": 2,
  "name": "Inline PDF",
  "version": "1.0",
  "description": "Removes the Content-Disposition response headers for PDF files to force them to be displayed inline instead of downloaded.\n\nNote: If opening a PDF from a link with a download attribute, you need to open in new tab to prevent it from being downloaded anyway.",
  "browser_specific_settings": {
    "gecko": {
      "id": "inline-pdf@zipdox.net",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "32": "icon.svg",
    "64": "icon.svg",
    "128": "icon.svg"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  }
}