Make Safari open links from other applications in current space

_Instructions.md

http://hints.macworld.com/article.php?story=20091013114424722

As a prerequisite, you'll need to install the RCDefaultApp preference pane https://github.com/Lord-Kamina/SwiftDefaultApps

Open AppleScript Editor and paste in content of _Script.scpt

Save the document using file format Application, and select the Stay Open checkbox. Name it SafariURLHelper. I have an Applications folder in my home directory in which I saved it. Using the Finder, navigate to where you saved SafariURLHelper, then Control-click its icon and select Show Package Contents from the contextual menu. Inside the Contents folder, find Info.plist, and open it in a text editor.

Add content of Info.plist to the bottom of the file, just before the closing and tags

If you had already run the script without this improvement, quit it using "Activity Monitor.app". You can also update the saved Helper app in Script Editor without the need to edit the Info.plist again - our changes are preserved.

_Script.scpt

on open location theURL
	tell application "System Events"
		if (count of windows of process "Safari") = 0 then
			tell application "Safari" to make new document
			tell application "Safari" to set the URL of the front document to theURL
		else
			tell application "Safari" to open location theURL
		end if
	end tell
	tell application "Safari" to activate
end open location

Info.plist

<key>CFBundleIdentifier</key>
<string>com.apple.AppleScript.SafariURLHelper</string>
<key>CFBundleURLTypes</key>
<array>
  <dict>
    <key>CFBundleURLName</key>
    <string>SafariURLHelper</string>
    <key>CFBundleURLSchemes</key>
    <array>
      <string>http</string>
      <string>https</string>
    </array>
  </dict>
</array>
<key>NSUIElement</key>
<true/>