Fireworks

In addition to your opinion,
If you already have a Creative Cloud All Apps subscription, you will need to change the Creative Cloud Desktop settings.
You can view Fireworks CS6 by enabling the "Show Older Applications" option in the screenshot and it will be available for download.

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Addition: Please refer here because the procedure was described in Adobe Helpx.

Why has Adobe stopped developing my app or service?

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Although it is not FireWorks, I had similar questions with other products, so please refer to it as well.

https://community.adobe.com/t5/get-started/edge-animate-cc-%E3%81%AF%E3%82%82%E3%81%86%E3%83%80%E3%82%A6%E3%83%B3%E3%83%AD%E3%83%BC%E3%83%89%E3%81%A7%E3%81%8D%E3%81%AA%E3%81%84%E3%81%AE%E3%81%A7%E3%81%97%E3%82%87%E3%81%86%E3%81%8B/td-p/9557908?page=1

"it does not have an option to show older apps."

• Fireworks is discontinued and not available to FREE, Trial or Single App plan members. 
• Individual plan members need  a PAID Creative Cloud ALL Apps plan and an older OS to support it.
• Teams / Enterprise members must request a Fireworks package from your IT dept admin.

Post back if you need more help.

For CS6 back to CS4 you may download ONLY if you bought direct from Adobe via download
-Log-in to your account and click this link https://account.adobe.com/products
--click Order history on the left and then the link to your order that will show on the right
--and finally click the link "Downloads and serial numbers" that will appear
--as always, write the serial number in a text file AND copy that text file and the
---download file(s) to an external drive (or two) to be sure you have what you need
-if you did not buy direct from Adobe via download you must find your original install
--if you have an Education or volume license you MUST use your original media
--the link for an Education or volume license download is not available at all
-if you bought a disc and don't have a drive you will need to buy an external USB drive
-if you bought a download from a 3rd party vendor you will need to contact that vendor