EWEW

  Actually it is!  Mining using  CryptoTab  Browser do pay you in BTC. It is a referral based system as many other similar mining platforms. The more miners you have referred to pays you more. The good thing about CryptoTab is you can mine it using your phone (Android/IOS) and it dose not affect the performance of your phone since the mining is cloud based for phone based mining.  Does it work on desktop? You can also mine with a desktop version, but if your system is not of a higher spec it is better to not do it. I have installed the browser on my Microsoft Surface Pro 7, i5 processor and 8 GB RAM, I could hardly do anything with my system when the mining was enabled, so, I had to uninstall the browser.  Withdrawal? Withdrawal is possible. You need to have a wallet, I use  Klever , If you do not have a sizeable number of referrals your withdrawal moment may arrive after a long long wait. In any case my reason to mine is I have already missed the crypto bus and just mining for fun.  H