The good news is that the solution is only a few clicks away.
When the pop-up appears, tap on theRemoveoption.
Any previously saved passwords will appear below as well.
When the options window pops up, punch Privacy & Security on the left of your screen.
punch in the URL in the indicated box and press the Block button.
If you ever change your mind, theres a Remove All Websites button at the bottom.
Theres also an option to remove specific sites as well.