firefox tcz
Some bugs
In the tabs at the top, there will sometimes be writing on top of other writing. When you first go to a new website, "Connecting" will be displayed. After it has connected, the name of the website will be displayed. With this bug, Connecting remains on top of the name of the website.
When you try to add a bookmark, the pop up window does not display properly.
After observing these bugs ever since updating to 4.0, I had a window pop up automatically, saying update to 4.0.1. I think it was an official one from Firefox. I think Firefox is aware of the bugs, has made an updated version, and is encouraging everyone to update.
Edit:
This popup window saying update windows came again, it has a link to this page
https://www.mozilla.com/en-US/firefox/4.0.1/releasenotes/