Examine source code of Reddit Better Top

{
  "manifest_version": 2,
  "name": "Reddit Better Top",
  "version": "1.0",
  "description": "Offering more time options for the 'Top' feature on Reddit.",
  "homepage_url": "https://github.com/CGodiksen/reddit-better-top",
  "icons": {
    "48": "icons/search_48.png"
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.reddit.com/*"
      ],
      "js": [
        "filter_posts.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/search_32.png",
    "default_title": "Reddit Better Top",
    "default_popup": "popup/search_top.html"
  }
}