[?]If a standalone Google Chrome Browser exists like Firefox

[bkpsusmitaa]

Debian's Firefox web-browser becomes quite backdated by the time it is released with the last edition of a particular release, like my Debian Stretch 9.11.0

Since I don't require cutting-edge security (my regular work are mundane daily routine computing work like web browsing, YouTube video watching, some Open Office calc work, etc.) from time to time I download and use Mozilla Firefox of a couple of editions before the latest release, for ease of compatibility with online banking transaction portals that I use to buy books or pay for telephone, electricity or internet bills online.

I have been searching but didn't find a similar download option for Google Chrome Browser, as some add-on available with Google Chrome Browser aren't available with Mozilla Firefox as add-on.

Firefox doesn't require installation. The Compressed File could just be extracted and run as standalone.

Could I be helped in this regard, including a link to such a page from where I could download a similar standalone Google Chrome Browser release, like I could from this Mozilla Firefox downloads page below?:
Firefox All Releases

[Head_on_a_Stick]

Debian's Firefox web-browser becomes quite backdated by the time it is released with the last edition of a particular release, like my Debian Stretch 9.11.0

The firefox-esr package has the same version in Debian stretch, buster, bullseye and sid. It is the latest available ESR version and so is fully up to date in respect of any security issues.

[arochester]

from time to time I download and use Mozilla Firefox of a couple of editions before the latest release

You could use the latest Firefox by adding the Ubuntuzilla Repository. (There has been discussion about it on this forum.) https://sourceforge.net/p/ubuntuzilla/wiki/Main_Page/

You could use the latest Google Chrome Browser by adding the Repository.
deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
and add the key
wget -q -O - https://dl.google.com/linux/linux_signing_key.pub | apt-key add -

[bkpsusmitaa]

You could use the latest Google Chrome Browser by adding the Repository.
deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main
and add the key
wget -q -O - https://dl.google.com/linux/linux_signing_key.pub | apt-key add -

Thank you, arochester, for your prompt and kind information. I would add one last question: why [arch=amd64]?

I followed all steps you mentioned and the instructions here:
How to Install Google Chrome on Debian the Easy Way

I received the following end output:

Package google-chrome-stable is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'google-chrome-stable' has no installation candidate

Is there no stand-alone Chrome/Chromium browser like Mozilla Firefox?