Userbase

Every website seems to want me to accept their use of cookies these days, I don't like it and I understand it can be harmful. Is there some kind of app that blocks cookies like ad blocker blocks adds? The websites reasoning is always a vague which leads me to distrust them immediately but these days avoiding cookies basically means binning your devices. Any help or advice is appreciated cheers.
Thank you

Steps
Click the Chrome menu button (⋮). ...
Click the Settings option.
Click Show advanced settings or Advanced.
Click Site Settings or Content settings. ...
Click Cookies.
Click the Allow sites to save and read cookie data slider. ...
Click the Block third-party cookies box.
Click Remove All to delete all stored cookies.

source : How to Disable Cookies - wikiHow

https://www.wikihow.com/Disable-Cookies

Use Firefox on the computer and your mobile phone (if you use Android): both will allow the installation of add-ons.

There is an add-on called Cookie Auto Delete, which allows you for each domain or subdomain to automatically remove the cookies after closing the last tab for that (sub)domain.

You can greylist (sub)domains: those cookies will only be deleted upon closing your browser. You can also whitelist a (sub)domain: those cookies will survive a browser restart.