IE was always poor with AB so I switched to Chrome. For a while it was excellent but things have deteriorated.
With chrome now there are times when it's great but other times when it just seems to freeze and won't let me type anything else or go back to edit typos. Sometimes I can get round it by clicking repeatedly on Submit and it eventually posts the unfinished post, but I usually just close the tab/window, go back into AB via another tab and start again.
When it's like this, at the bottom left corner of my screen there are lots of messages in tiny grey script saying 'waiting for...' and something about scripts. At other times I just get a message saying AB isn't responding.
The solution involving blocking ads is sometimes suggested but I'm not sure it's the answer. I tried it a while ago and it was fine but I think sites like AnswerBank are now starting to fight back against adblockers- some ads slip through for a few seconds and some of the messages at the bottom suggest scripts in AnswerBank are having a running battle with the adblocker. So, sometimes, I find it quicker to remove the adblocker and just sit and wait while ads loaded.