A browser extension that prevents the anti-selection scripts from web pages.
It prevents anti-selection event handlers like document.body.onselectstart or anti-selection styles like user-select: none.
Extension is available for Chromium-based browsers (Google Chrome, Microsoft Edge, Opera) and Mozilla Firefox.
https://chrome.google.com/webstore/detail/dont-touch-my-selection/fclmnhckdlnelleiohompeejmcilkpcf
https://addons.mozilla.org/en-US/firefox/addon/dont-touch-my-selection/
Install the extension, then click the 'Prevent anti-selection' icon on the toolbar.
Please create a new issue that containing the site address and details of the problem.