Examine source code of Corvimae's Better SRC

{
  "manifest_version": 2,
  "name": "Corvimae's Better SRC",
  "version": "1.7",
  "description": "Some UX improvements to the usability of speedrun.com.",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "permissions": [],
  "content_scripts": [
    {
      "matches": [
        "*://*.speedrun.com/*"
      ],
      "js": [
        "scripts/inject.js"
      ],
      "css": [
        "styles/leaderboard-page.css"
      ]
    },
    {
      "matches": [
        "*://*.speedrun.com/modhub*"
      ],
      "css": [
        "styles/modhub.css"
      ]
    },
    {
      "matches": [
        "*://*.speedrun.com/user*"
      ],
      "css": [
        "styles/profile.css"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{63556afe-e3fb-466b-8d1e-091198a81458}"
    }
  }
}