Yeah here only utilize desktops / laptops running Linux or any version of Microsoft with IE or Firefox only.
I have utilized Firefox to post in Android on my tablets but it's a PITA and too time consuming for me.
I have no issues posting with the new Baytrail W10 in either tablet mode or desktop mode using Microsoft Edge or Firefox.
Yesterday tried via IE V8 on an XP SP3 desktop and it worked fine.
I utilize Linux laptops, desktops, servers, Windows laptops, desktops and servers here with no issues relating editing text or whatever with Cocoontech.