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manifest.json
{
  "manifest_version": 2,
  "name": "Command Palette",
  "version": "1.0",
  "description": "Control Firefox with Sublime/helm-M-x style fuzzy complete. Use it from the omnibar with the ; search prefix, or trigger a pop-up with Ctrl+Space. Keybinding is configurable.",
  "omnibox": {
    "keyword": ";"
  },
  "background": {
    "page": "background.html"
  },
  "permissions": [
    "contextualIdentities",
    "cookies",
    "tabs"
  ],
  "icons": {
    "16": "icons/16.png",
    "32": "icons/32.png",
    "48": "icons/48.png",
    "64": "icons/64.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "icons/32.png",
    "default_title": "Command Palette",
    "default_popup": "command-bar.html"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Space"
      }
    }
  }
}