I noticed something weird in Firefox 1.5 RC1 (Build 2005102519). When IMON HTTP detects some malware and i click Terminate i get warning from Firefox that partfiles are missing and blablabla. I tried both, Compatible and Efficiency modes and i got the same results most of the time. Firefox 1.0.x never had such problems. End result is that downloading is most probably really terminated but files still remain in FF primary download location... Other thing i noticed is that KAV2006 Beta which i'm beta testing at the moment doesn't appear to have these problems in FF 1.5. So my advice is that you check IMON HTTP part before Firefox 1.5 is officially launched or talk to Mozilla devs on how to fix this or how to make a workaround.