I have been running the latest version of VE and started using Firefox 3.5 when it came out in RC. It is now out in final release. When trying to customize a toolbar by adding a button to it, Firefox immediately stops working when I try to close the “Customize” window. After disabling Verification Engine in the Firefox 3.5 add-ons, and then restarting Firefox 3.5, customizing a toolbar by adding a button to it, works like it is supposed to. Verification Engine causes this problem in Firefox 3.5, so there is an incompatibility issue with Verification Engine and Firefox 3.5.
I then re-enabled Verification Engine through the Firefox add-ons and it is working and I have the buttons I added when VE was disabled. That is the only incompatibility that I find. You simply cannot customize Firefox 3.5 toolbars when Verification Engine is enabled in Firefox 3.5 add-ons.
I have similar problem: Firefox 3.5 can’t shutdown after updating to CIS (latest version, 3.10…, Date: 05.07.2009). If close Firefox then takes 50% of CPU Time. If launch and close Firefox 2 times, then browser takes up to 100 % CPU and freeze system until destroying Firefox processes manually (Task Manager or Process Explorer). Uninstalling CIS solve problem.
Vengine 2.7.0.14 will crash Firefox 3.5 if you activate customize tool bars screen (put cursor on tool bar, right click, select customize on menu.). The screen come up but when you hit the done button Firefox crashes. If you have questions let me know glad to help if i can. Love your firewall!