firefox quantum download for windows 10 64 bit

I was able to use both the Firefox browsers at the same time on my laptop. Then I closed the web browser 'Firefox Quantum 63.0 (64-bit)' and then the installation of web browser 'Firefox Developer Edition 64.0b4 (64-bit)' got done.Īlso, when I open one of the both browsers and then try to another browser the dialog box with the same message appear, I've to close the opened browser and then the other browser can be opened.įew days ago, this was not the problem on my laptop. Process must be closed to open a new window. I downloaded the 'Firefox Developer Edition 64.0b4 (64-bit)' installer file from the web browser 'Firefox Quantum 63.0 (64-bit)' and started the installation process by clicking on the downloaded installer file.ĭuring the installation process only a dialog box appear having the below message :įirefox is already running, but is not responding. Then, I installed the web browser 'Firefox Developer Edition 64.0b4 (64-bit)' on this laptop.

I've installed the web browser 'Firefox Quantum 63.0 (64-bit)' on this laptop. I've a laptop on which Windows 10 Home Single Language 64-bit Operating System is installed.

Firefox quantum download for windows 10 64 bit