However, running the web interface in Firefox is a mess of slowness issues that see me give up entirely. I am considering that this issue is related to Firefox addons but wondering about the experience of others.
Your instinct is probably right that it may be a local issue with your firefox setup. Firefox is our primary platform (we're Linux guys afterall), so its the one hat gets the most attention. If you have two browsers on the same box, and one is slower, I'd start by testing a default installation of the browser to see if it really is the browswer. Make sure you disable any desktop (or network) software that scans/proxies web connections (and any plugins or extensions for your browser that do this, or anything else connection related like antivirus, antirootkit, WOT, McAfee Site Advisor, etc.) and of course any plugins.
The absolutely best way to base line browsers, is to do a clean new OS install and a default install of one browser, then test. Then do another clean install, test another browser. VMWare, KVM, etc. are great for this. Otherwise, if you try to do this from a single desktop (that has all sorts of other software, changes, etc.) you have too many external variables distorting your experiment, two browsers may change settings in the registry affecting the other (accidentally), they might share a library of slightly different versions (and so one is not working optimally), etc.
Although I have submitted a ticket to support re: false positive not being reported when sent via aslweb.
We replied to that case earlier today, could you please respond to the request for additional information? We need you to check your mail logs to see if these FPs were sent. False positives (and negatives) and sent via your email system, and we dont see anything on our end, so we think your system isnt sending anything at all. Please see the case for more details. I know from the past that your system has had issues with your MTA, so please check your logs and update the case with that information so we can help you with this issue.