Open Browser Action's Popup with keyboard shortcut

I'm developing a Google Chrome 开发者_StackOverflowextension with a Browser Action Popup. When the user clicks on the icon, the popup appears.

Is there a way to open this popup with a keyboard shortcut like CTRL+something?

You need to add a "commands" object to your manifest.json, as shown at https://developer.chrome.com/extensions/commands. If your extension's popup is a "browser_action" popup (indicated by a "browser_action" key in your manifest.json), you'll need the "_execute_browser_action" command; for a "page_action" popup, you'll need the "_execute_page_action" command. An example manifest.json using the former looks like this:

{
  "manifest_version": 2,
  "name": "Example Extension",
  "description": "La la la",
  "version": "1.0",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+E",
        "linux": "Ctrl+Shift+K",
        "windows": "Alt+Shift+P",
        "mac": "Alt+Shift+P"
      }
    }
  }
}

Note that, per the docs:

Certain Chrome shortcuts (e.g. window management) always take priority over Extension Command shortcuts and can not be overwritten.

As far as I know, there's no canonical list of what these commands are; you just have to experiment with different possible suggested shortcuts until you find one that actually works.

The chrome.commands api enables the user to bind hotkeys (with your suggestion for the hotkey) that will trigger commands such as opening the browser action.

Sorry, currently not possible. Here is corresponding feature request, you can star it.