Examine source code of Click Color Changer

{
  "manifest_version": 2,
  "name": "Click Color Changer",
  "version": "1.0",
  "description": "Click any element on a webpage to instantly change its background color — customize pages to match your style",
  "icons": {
    "48": "solid-color-icon.png",
    "96": "solid-color-icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "solid-color-icon.png",
    "default_title": "Solid Color"
  },
  "background": {
    "scripts": [
      "solidcolorBKGD.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6ce9b685-fb76-49de-b569-a03cf438a230}"
    }
  }
}