Make RSS Great Again

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Make RSS Great Again",
  "version": "0.0.3",
  "description": "Adds RSS buttons to websites",
  "manifest_version": 2,
  "web_accessible_resources": [
    "img/*.*"
  ],
  "icons": {
    "16": "img/icon-16.png",
    "48": "img/icon-48.png",
    "128": "img/icon-128.png"
  },
  "background": {
    "scripts": [
      "background_script.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://twitter.com/*"
      ],
      "js": [
        "twitter/twitter_content_script.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "js": [
        "youtube/youtube_content_script.js"
      ]
    },
    {
      "matches": [
        "https://www.reddit.com/*"
      ],
      "js": [
        "reddit/reddit_content_script.js"
      ],
      "run_at": "document_end"
    },
    {
      "matches": [
        "https://news.ycombinator.com/*"
      ],
      "js": [
        "hackernews/hackernews_content_script.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "tabs"
  ]
}