Just a couple of things to note...
WGT "does" have a program running with the meter to deter auto ding programs, they admitted it a couple of years ago when the updates had the game totally messed up and they had to shut it down...that's old news.
Sometimes browser and/or flash updates are not compatable with the game, just roll it back to previous version(s) and turn off auto updates...
The browser/flash/WGT isn't always the problem...once the game started playing like sh!t for me and nothing I did was helping to get it fixed for a couple of days...I was watching the file names loading and noticed one that wouldn't load, checking the file out I found out it was associated with my ZoneAlarm software firewall...
Updated the firewall and the game was back to normal...I have no idea why to this day but the firewall was the problem, and I have read and heard of other similar incidents...
Almost any browser will work if setup correctly for WGT, it is something else more times than not, you just have to find it...