Not just the browser, the whole platform was crap to develop for. My company ported a bunch of apps by a major app publisher to various versions of Windows Phon

Not just the browser, the whole platform was crap to develop for. My company ported a bunch of apps by a major app publisher to various versions of Windows Phone and the documentation was shitty, the APIs were shitty, everything shifted with each new version and everything was buggy. We kept asking our local Microsoft branch for help (backed by the publisher we were porting for) and more often than not they were powerless to help. A far cry from developers, developers, developers.