In order to prevent quirks mode in IE9 I need to add this lines at the very top of every HTML page:
You can write the whole header by yourself, by adding disableAllHeaderCode = 1 to your typoscript or you can hack it by adding your meta tag directly to the head tag:
page.headTag = <head><meta http-equiv="X-UA-Compatible" content="IE=edge" />
Place this at your typoscript
meta.X-UA-Compatible = IE=edge,chrome=1
httpEquivalent: (Since TYPO3 4.7) If set to 1, the http-equiv attribute is used in the meta tag instead of the “name” attribute. Default: 0.
If you have any queries, please do not hesitate to contact me at Jainish Senjaliya