IMO Firefox is a much better browser although I use Chrome also.
You can also use Chrome or IE again as a backup browser.Just make sure you are infection free.You might want to run some scans with a couple different on demand scanners to make sure. Such as Hitman Pro,ESET Online Scanner,Emsisoft Emergency Kit not to mention your real time AV protection if you have one.
As @jamescv7 pointed out that MBAM might have corrupted or removed some IE files is a good possibility.