Im using Firefox but thats not the problem, as Im always using the newest version.
Its the WP-code, that has been changed.
Im using Firefox-Noscript-Addon which enables to allow or forbid JS for different domains. So in the past Google-JS was forbidden, when I was blogging, while WP.com and other necessary domains like gravatar.com were allowed.
Since May 13 its impossible to write a new post in WPs dashboard without Google.com-JS being allowed.
Nearly every single button for formatting text in the dashboard depends on Google-JS now.
Maybe ask one of your code-programmers. He will confirm this.
Thx in advance!