Examine source code of FireCsv

{
  "id": "586de965-3ac7-4f4f-8f39-5ceae75c040f@jetpack",
  "manifest_version": 2,
  "name": "FireCsv",
  "fullName": "FireCsv",
  "title": "FireCsv",
  "version": "0.3.2resigned1",
  "author": "metagriffin",
  "description": "View pretty CSV directly from within Firefox and Thunderbird.",
  "homepage": "http://github.com/metagriffin/firecsv",
  "homepage_url": "http://github.com/metagriffin/firecsv",
  "icons": {
    "24": "firecsv/logo.svg",
    "32": "firecsv/logo.svg",
    "48": "firecsv/logo.svg",
    "64": "firecsv/logo.svg",
    "128": "firecsv/logo.svg",
    "256": "firecsv/logo.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "586de965-3ac7-4f4f-8f39-5ceae75c040f@jetpack"
    }
  },
  "applications": {
    "gecko": {
      "id": "586de965-3ac7-4f4f-8f39-5ceae75c040f@jetpack"
    }
  },
  "contributors": [],
  "translators": [],
  "license": "GPLv3+",
  "dependencies": [],
  "permissions": [
    "<all_urls>",
    "webRequest",
    "webRequestBlocking"
  ],
  "default_locale": "en",
  "web_accessible_resources": [
    "libs/jquery-3.3.1.min.js",
    "libs/jquery.csv-0.71.min.js",
    "libs/underscore-1.6.0.min.js",
    "libs/chart-1.0.1-beta.4.min.js",
    "firecsv/viewer.css",
    "firecsv/viewer.js"
  ],
  "background": {
    "scripts": [
      "extension/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "extension/content.js"
      ]
    }
  ]
}