Use Chrome or ungoogled chromium with a well known name Bluetooth 4.0 adapter.
I’d recommend the Asus BT400 . - Cheap to buy NEW on Ebay too -
also more help at -
how-to-connect-your-147-sex-toys-for-interactive-2d-and-vr-including-the-handy-fleshlight-launch-kiiroo-keon-vorze-lovense-and-more-step-by-step-guide-with-pictures
What BlueTooth adapter you have @dsfkjsdjfl ?