WhstsApp does no longer work on sailfish.
sony xperia I and sfos 4.3.0.12
https://www.whatsapp.com/android
click on download, for me the browser says either wait or close. On wait nothing happens, only closeing works.
Whstsapp refuses to start because of not the newest version.
I confirm. A new tab is opened and nothing more happens.
Must be something new in the web-code because a couple of weeks ago it worked flawlessly.
However, there is a workaround. You can download it from a PC browser and copy the apk file to the phone via cable.
Iād suggest to use Aurora store to tap into the google play store: https://f-droid.org/de/packages/com.aurora.store/
Only a small note from my side. I downloaded the apk with browser by clicking the link in Whatsapp just this morning. But I have Xperia10II with 64 bit system on 4.3.0.12. So maybe the different architecture makes the difference?
worked very well. cheers bernd
switching to Xperia 10II is something I should have been done already, but did not ā¦
the Aurora store is very helpfull for Android Apps 
I did not know about this one.