Meph posted a hotfix a while ago for those who didn't want to swap to Chrome - Shrink the browser to the size of a DS screen. However, I've accidentally stumbled upon my own fix that somehow works quite well.
Tap's Fix: Play all trials within Firefox's safe mode.
Seriously. I'm using Firefox 5.0.1 at the moment, and whenever I play it outside safe mode, the text speed lags. By restarting the browser in safe mode, the text speed is executed exactly as you set it to. There's no need to resize the screen.
{How do you open Firefox in safe mode?}
- 1. Click the "Firefox" icon at the top of the screen.
- 2. Scroll down to "Help" and select "Restart with Add-ons Disabled". Firefox will then restart in safe mode, although it'll hit you with the safe mode dialog box first.