Open the Firefox options, click the General tab and find the Language And Appearance section. Then click the Colors button in that section. This allows you to change the default visited link color.

"Open Edge browser.

Click on the ellipses"..." on the top right corner.

Click on Settings and then click on "Privacy and Security".

Under the description "Clear Browsing data" click on "Choose what to clear".

Uncheck all the options.

Turn off the option "Always clear this when I close the browser".

Re-open the Edge browser and try opening few websites using the search engine and see if the color of the hyperlinks change.