Yes @jbialobr  mentioned there were no native English speakers on the team. However, I think your English is pretty good - put it this way - your English is much better than my Polish (of which I know nothing!).

To me, the statement "an as good display quality as for HTML" seems like it should be written "an 'as good' display quality as for HTML".  If you take out the "an" the sentence then doesn't make sense unless you add the "a".