What do I use now that flash player is being disabled?

The only solution is for the developers of those sites to update their code to use modern technologies. As of 12/31/2020 Adobe is dropping support of Flash worldwide. All browsers, for all operating systems, will begin removing Flash support. Even now you can no longer download Flash from Adobe’s website. Any offer of a Flash download will be fake and probably loaded with malware. Adobe even says they will begin blocking Flash media from playing on 1/1/2021.

As for websites that require Flash, developers were given three years notice by Adobe that this was coming. In short order these websites and apps will stop working unless they update to modern technologies.

Adobe Flash Player EOL General Information Page

Apple decided not to wait until the end of this year. Apple dropped Flash support in Safari 14.0

Any websites still relying on flash, should be avoided. Websites should have been updated to newer, safer options by now. Most current websites use HTML5 now for things Flash did.

There is no reason for any website to still be using it. It is a dead technology, full of vulnerabilities.