Adobe Flash Player not working properly - website info

[inrobert]

I use a website to fill up interactive forms, for example tax forms. Recently it stopped working (it definitely did work on v27 and I think it did work on v 28.1 and v28.2). The website shows a message, that says web browser is not working properly with Adobe Flash Player. I tried Edge and it works.
Here is the website: https://www.druki-formularze.pl/. You can click on any of the orange buttons saying "Wypełnij" (means "fill up") and you should see the problem. Direct link to one of the forms: https://secure.fillup.pl/online/fillUp/index.php?&formId=4814290&partner=df.

I'm using Pale Moon 28.4.0 (64-bit) on Windows 10 Home 64-bit, Adobe Flash Player 32.0.0.156 (visible in Pale Moon plugins and in Windows installed applications). I haven't noticed any other Flash problems on my computer.

[yami_]

For some reason this website dislikes the Firefox/60.9 slice in the default Pale Moon UA string. You can use something like this SSUAO to work around this issue: general.useragent.override.secure.fillup.pl;Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:60.9) Goanna/4.1 PaleMoon/28.4.0.

[inrobert]

Thanks to your answer I found another workaround: in advanced options switch user agent to native.

[yami_]

Keep in mind that some websites (for example http://mapy.geoportal.gov.pl/) will refuse to work with the native UA. Anyway, good to know it now works for you.

[inrobert]

Yeah, I will change to native only for this website. I guess in some time user agent will be modified in Pale Moon or the website will be fixed.

[Tomaso]

or the website will be fixed.

Unfortunately, this doesn't happen very often.
Webmasters that resort to UA sniffing seems to be a lazy buch of people.
Over the years, I've reported many issues related to this sloppy practice, but to no use! :(