There any number of ad blockers you can use. A popular and often recommended one is uBlock Origin. That's available for Google Chrome, Chromium, Opera, Firefox, Firefox for Android, SeaMonkey and even Microsoft Edge and Apple Safari. For Google Chrome you can find it in the Chrome store here https://chrome.google.com/webstore/deta ... phjbkeiagm. Links for other browsers can be found here https://github.com/gorhill/uBlock/blob/ ... stallation.
After installing uBlock Origin and reloading the page, ads (on all websites) should be gone. You can disable uBlock Origin for specific websites if you don't mind their ads and/or want to support them. You may find with uBlock Origin on the Linux Mint forums it leaves a, albeit smaller, bar at the top of the page where otherwise ads would have been displayed. You can remove that with the eye dropper tool of uBlock Origin (click on the uBlock Origin icon in your toolbar to access it): https://github.com/gorhill/uBlock/wiki/ ... #the-tools.
Linux Mint is funded by donations and ads on the website.