Applescript / Keyboard Maestro Macro to switch to last tab in Safari.

Script.applescript

tell application "Safari"
	set tabCount to number of tabs in front window
end tell

tell front window of application "Safari"
	set current tab to tab tabCount
end tell

Switch to Last Tab.kmmacros

<?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>
	<dict>
		<key>Activate</key>
		<string>Normal</string>
		<key>CreationDate</key>
		<real>469386566.37803501</real>
		<key>FocussedWindowConditionType</key>
		<string>Exists</string>
		<key>IsActive</key>
		<true/>
		<key>Macros</key>
		<array>
			<dict>
				<key>Actions</key>
				<array>
					<dict>
						<key>DisplayKind</key>
						<string>None</string>
						<key>IncludeStdErr</key>
						<true/>
						<key>IsActive</key>
						<true/>
						<key>IsDisclosed</key>
						<true/>
						<key>MacroActionType</key>
						<string>ExecuteAppleScript</string>
						<key>Path</key>
						<string></string>
						<key>Text</key>
						<string>tell application "Safari"
    set tabCount to number of tabs in front window
end tell

tell front window of application "Safari"
    set current tab to tab tabCount
end tell</string>
						<key>TimeOutAbortsMacro</key>
						<true/>
						<key>TrimResults</key>
						<true/>
						<key>TrimResultsNew</key>
						<true/>
						<key>UseText</key>
						<true/>
					</dict>
				</array>
				<key>CreationDate</key>
				<real>0.0</real>
				<key>IsActive</key>
				<true/>
				<key>ModificationDate</key>
				<real>469386895.74191302</real>
				<key>Name</key>
				<string>Switch to Last Tab</string>
				<key>Triggers</key>
				<array>
					<dict>
						<key>FireType</key>
						<string>Pressed</string>
						<key>KeyCode</key>
						<integer>25</integer>
						<key>MacroTriggerType</key>
						<string>HotKey</string>
						<key>Modifiers</key>
						<integer>256</integer>
					</dict>
				</array>
				<key>UID</key>
				<string>932A436B-3B57-4155-9057-6E32E29A46FC</string>
			</dict>
		</array>
		<key>Name</key>
		<string>Safari Macros</string>
		<key>Targeting</key>
		<dict>
			<key>Targeting</key>
			<string>Included</string>
			<key>TargetingApps</key>
			<array>
				<dict>
					<key>BundleIdentifier</key>
					<string>com.apple.Safari</string>
					<key>Name</key>
					<string>Safari</string>
					<key>NewFile</key>
					<string>/Applications/Safari.app</string>
				</dict>
			</array>
		</dict>
		<key>ToggleMacroUID</key>
		<string>B632E007-0F39-4112-A403-6EFDD3E0264D</string>
		<key>UID</key>
		<string>37249F4C-C592-473B-B492-9DACFDD20972</string>
	</dict>
</array>
</plist>