can't install WP

No. Try using another browser or another computer.

Do you have WordPress installed on a webserver, or are you trying to install it on your own computer? If the latter, then you need to have an apache/msql/php environment configured and running, and have installed the wordpress files in the webroot for that environment.

I use MAMP for my local setup on Mac.

Go to Task Manager and under the process tab find firefox.exe highlighted and press “End Process”
Restart Firefox.
ON PC only

Same problem for me in installing it on https://www.cricindian.com

Need some quick help..

@teesra, try contacting your hosting provider.