Updated version with more features and support for Google Chrome - BrowserTabs
SafariTabs Features
Close all tabs to the right or left of the active tab in Safari with a keyboard shortcut (recommended shortcuts - Command+Left / Right Arrow)
Move to the left / right tab with keyboard shortcuts (recommended shortcuts - Command+Alt+Left / Right Arrow)
Move to the first or last tab in the Safari window with keyboard shortcuts (recommended shortcuts - Command+Alt+Up / Down arrow)
Install the workflow, add your own shortcuts for each command.
Help for the keyboard shortcut setup:
closeleft - closes all tabs to the left
closeright - closes all tabs to the right
tabright - activates the next tab to the right
tableft - activates the next tab to the left
lastTab - activates the first tab, to the left
firstTab - activates the last tab, to the right
Download SafariTabs