Examine source code of HAR Export Trigger

{
  "name": "HARExportTrigger",
  "author": "Jan Odvarko",
  "short_name": "HARExportTrigger",
  "version": "0.6.2resigned1",
  "devtools_page": "src/devtools.html",
  "description": "Trigger HAR export from within a web page",
  "manifest_version": 2,
  "homepage_url": "https://github.com/devtools-html/har-export-trigger/",
  "applications": {
    "gecko": {
      "id": "harexporttrigger@getfirebug.com",
      "strict_min_version": "61.0"
    }
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "lib/harapi.js"
  ]
}