Chrome: If you keep lots of tabs open in your browser window, it can be a minor pain to find one when you need it. Tab Organizer is a Chrome extension that helps you maintain them a little better.

tab grouping function since version 83, but to use this function, select 'Add tab to group' from the right-click menu on each tab, or drag and drag the tab & You need to drop and put them together.

Everyone is probably aware of how to open links in new tabs in your favorite browser—just Command-click the link, and it will open in a new tab, instead of replacing your current window’s contents.