Hello evie7 and AndyInMokum, may I share a alternative opinion?
evie7, do yourself a big favor, and don't remove Chromium. Just don't use it!
Now if you wan't to remove Chromium as a stand alone Menu item we can do that, but save yourself a lot of grief, by not removing Chromium browser from your system. (I once insisted on removing Chromium with hardheaded determination. PCNetSpec warned me that this was not a good idea, but I insisted, and I removed Chromium, and I had four-fifths an operating system when I was done!

Why leave Chromium? Because it's tied in to a lot of processes that Peppermint uses. If you remove Chromium you'll discover one day that this program doesn't work, or that program doesn't work, and then you'll realize you did all this damage to yourself, and your OS, by removing Chromium browser.
But like I say, we can replace it's entry in your Menu, above Software Manager, if you'd like to see a different browser and icon listed there.
Here's what this procedure would consist of:
http://forum.peppermintos.com/index.php/topic,869.msg7464.html#msg7464I do not know the commands to replace Chromium with Qupzilla -- because I never use Qupzilla. But with a little experimentation -- and AndyInMokum's help -- we can find the right commands to replace Chromium and its icon as a standalone Menu item.
Of course if you're absolutely determined to remove Chromium browser from your system as I once was, well, give it a whirl. This is how we learn Linux. It's almost a rite of passage, I believe. And AndyInMokum is both a Qupzilla user and a Qupzilla enthusiast. He knows what he's doing.
Good luck with whatever you decide!

perknh
P.S.
I usually replace Chromium with Chrome browser. Chrome is a heck of a lot nosier than Chromium browser, I admit that, but with few tweaks and add-ons, that problem can be solved. And, although, I hate to admit it: Chrome browser works better on my computers than Chromium -- don't ask me why. But Firefox is getting better and better all of the time. Firefox is a winner too. But, contrary to popular belief, Firefox can be a nosy browser too. Again, with add-ons and a few tweaks, Firefox will work just fine.
I go back and forth between Chrome and Firefox -- using Chrome 90% of the time. Now if you decide to get Chrome, use this link. It's secure and stable:
https://www.google.com/chrome/Firefox you can get from your Software Manager.