# Choosy Help: Behaviour settings

This page describes the settings on Choosy's “Behaviour” tab. To find these settings open System Preferences, click on the Choosy icon and then click on the Behaviour tab.

The settings on this tab allow you to set how Choosy will behave in various situations:

1. When one or more browsers are running
2. When no browsers are running
3. When an URL shortening service has been used

## When one or more browsers are running

This setting defines what will happen when you click on a link and one or more of the browsers in your Choosy browser list is already running. If another browser that is not in your browser list is running the “no browsers are running” setting will be used instead.

Use best running browser
  When you click on a link Choosy will pass the link on to the best running browser. “Best” here means the browser that is nearest to the top of your browser list.
Prompt to select from running browsers
  When you click on a link Choosy will prompt you to select from all the browsers (from your browser list) that are running. If only one browser is running that browser will be used and no prompt will be displayed.
Prompt to select from all browsers
  When you click on a link Choosy will prompt you to select from all the browsers in your browser list. The icons for running browsers will be solid, the icons for browsers that are not running will be semi-transparent.
Use my favourite browser (even if it's not already running)
  When you click on a link Choosy will use the browser at the top of your browser list regardless of whether or not it is currently running.

## When no browsers are running

This setting defines what will happen when you click on a link and none of the browsers in your Choosy browser list are running.

Use my favourite browser
  When you click on a link Choosy will use the browser at the top of your browser list.
Prompt to select from all browsers
  When you click on a link Choosy will prompt you to select from all the browsers in your browser list.

## When an URL shortening service has been used

This setting defines how URLs that have been shortened using a service like bit.ly or tinyURL will be displayed in the browser prompt.

Because it is specific to how URLs are displayed this setting is only available if the “Display the URL in the prompt” setting is enabled.

Never expand URLs
  Choosy will never try to expand URLs for you.
Only expand known short URLs (bit.ly, tinyurl etc.)
  Choosy will only try to expand URLs for you if they are from a known URL shortening service. See below for more information about which services are supported.
Try to expand all URLs
  Choosy will make a request to all URLs that it opens to see if they respond by redirecting to another website.

### Supported URL shortening services

- tinyurl.com
- bit.ly
- post.ly
- is.gd
- j.mp
- tr.im
- goo.gl
- flic.kr
- 4sq.com
- gowal.la
- gbrck.com

### Adding more URL shortening services

You can add more URL shortening services to Choosy by creating a property list file that lists their domains.

1. Copy and paste the following code into a new TextEdit file:

       <?xml version="1.0" encoding="UTF-8"?>
       <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
       <plist version="1.0">
       <array>
         <string>example.org</string>
       </array>
       </plist>

2. Replace `example.org` with the URL shortener that you want to use
3. Add any other shorteners on subsequent lines, e.g.:

         <string>example.org</string>
         <string>example.com</string>

4. Save the file to /Users/you/Library/Application Support/Choosy/short_urls.plist (replacing you with your own username)