Hi Victoria. I'm Greg, an installation specialist, 10 years awarded Windows MVP, and Volunteer Moderator, here to help you.
To install an app in Compatibility Mode In Windows 10 see this guide:
https://www.groovypost.com/howto/run-old-softwa...
But a browser's Compatibility Mode is something different and explained here for the browsers that are known to have it:
https://www.reddit.com/r/chrome/comments/392acz...
https://support.google.com/chrome/thread/340413...
https://support.google.com/chromebook/thread/55...
https://www.quora.com/How-do-you-get-Compatibil...
If this doesn't help you with what you need, then please post back more on what exactly you're looking for, so I can help you better.
I hope this helps. Feel free to ask back any questions and keep me posted. If you'll wait to rate whether my post resolved your problem, I will keep working with you until it's resolved.
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