Examine source code of PoppyHex

{
  "manifest_version": 2,
  "name": "PoppyHex",
  "version": "1.0.1",
  "description": "A color tool that gives a preview of any highlighted Hex/RGB code in a given webpage.",
  "permissions": [
    "storage",
    "tabs"
  ],
  "icons": {
    "48": "./icons/hex_a48.png",
    "96": "./icons/hex_a96.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "./src/popup/PoppyHex.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_action": {
    "default_title": "PoppyHex",
    "default_popup": "./src/menu/menu.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@poppyhex.com"
    }
  }
}