URL: https://cloud.google.com/

Browser / Version: Firefox 64.0
Operating System: Windows 10
Tested Another Browser: Yes

Problem type: Site is not usable
Description: Online google cloud shell does not wirk
Steps to Reproduce:

• Google cloud offers a service in which you can "rent" computers with a certain operating system, it's like azure, or amazon web services, these are called "vm instances", you can use it per hour and only charge what you use

• If this is the first time you use the service, they "give you" a little money to try the service, there is also a version of "vm" (virtual machine) in which you do not charge the first 720 hours of the month

The steps to follow are:

1. Enter the Google Cloud platform (from where you manage all services)

2. You create an "instance" (virtual machine)

3. I imagine that the characteristics of the virtual machine in this case are irrelevant

4. An "instance" is created

• Google unlike other services allows you to make ssh connection from the browser, you do not have to add your public keys and enter from the terminal of your computer, it does open a kind of popup window in the browser, has the same functions as a basic terminal, to enter this virtual terminal we must:

5. you look for the name of the instance that we created, and to the right of it and below the "Connect" option there is a button that says ssh

6. This will open a kind of pop-up window, which in firefox 63 works correctly (attached screenshot where the "correct" operation is shown)

7. While Firefox developer edition with compilation id number "20181025233934", you can not see the terminal, basically the black screen remains

8. Attached screenshots, in the following link:

https://drive.google.com/open?id=1pmqF8R0FBLb_MVjfcPdyprAZilf26lrV

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