The best alternatives to Boomerang are SuperTabs, Partizion, and Tab Switcher. If these 3 options don't work for you, we've listed a few more alternatives below.
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Postman Recorder by DevTools— Export Postman APIs from browser
Have you ever lost in the large amount of open tabs in your browser? Do you know how many tabs are open now? SuperTabs list all your open tabs and let you search and switch to them in just second to increase your productivity. The badge number indicates number of open tabs. For increased speed, add a keyboard shortcut and you will be a tab ninja!
Tab Switcher is a powerful browser manager for Safari and Chrome that provides fast switching between tabs and windows. This app will list your tabs and you can switch or bring them in front instantly. You can also filter, navigate around and apply commands with your keyboard.
Out of sight, out of mind ―hide tabs when you switch to something else, and bring them back when you need them again. Read later ― keep tabs in Wardrobe until you have time to read them.