Examine source code of View Link as Text

{
  "manifest_version": 2,
  "name": "View Link as Text",
  "description": "View links as if their Content-Type was text/plain",
  "version": "1.0.1resigned1",
  "author": "David Corbett",
  "homepage_url": "https://github.com/dscorbett/view-link-as-text",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "<all_urls>",
    "contextMenus",
    "webRequest",
    "webRequestBlocking"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ac98ef6d-78ad-4725-8a78-1756e05681a5}"
    }
  }
}