Is Close Tabs Shortcuts safe?

Keyboard shortcuts close other tabs, tabs to the left, or tabs to the right of the current tab.

This extension adds shortcuts for closing groups of tabs around the current tab. By default, Alt+W closes other tabs, Alt+Shift+F1 closes tabs to the left, and Alt+Shift+F2 closes tabs to the right; in Firefox 66 and later, these shortcuts can be changed in the Add-ons Manager.