Custom Button is a simple Chrome extension where you can customize a button, set an URL, change the icon and some other stuff.

Just go to options and set the url and the window mode on activation. You can also set a regular expression to match a certain domain and activate notifications when the match fails.

Add %url anywhere in the string and it will be replaced by the active tab url. For example:
http://www.sciweavers.org/iWeb2Shot?url=%url

Choose the opening mode:

• Current tab: opens in the active tab.
• New tab: creates a new tab.
• New window: creates a new Chrome window.
• Popup window: create a new window but in a popup style, no toolbar, no tab bar, just window border and content.
• Popup on button: tries to open the site in a popup. Due to browser security policies, some sites won't load in the button popup. For example Google sites and Facebook won't load.

For example, you could set the url to chrome://extensions and then set it to open on a popup window. This way your button will open the extensions page on a separate popup window, pretty cool!

• Initial release.
• Displays button on toolbar.
• Custom URL.
• 5 modes to open URL: Current tab, new tab, new window, popup window, popup on button.
• Custom icon.
• Restrict to domain using regex.
• Notifications when domain doesn't match. Customizable.