Yes you are. But you might be the next time. As rogues are popping out everyday like mushrooms after a rain, and ALL antivirus can’t keep up, there will be few which even avast will miss.
My recommendation, download Sandboxie free. Run any browser you have in Sandbox (right click > run sandboxed). Set it to delete on closing. That way, if anything by pass avast, you system is still safe as sandbox create a virtual environment and your real system is no9t harmed.
Yes. Please submit the link to avast ONLY after you run your browser in Sandbox. It will help to increase avast detection rate.
For further precaution, you can install Web Of Trust for your browser. Green is usually good to go. Red means danger.