User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6 When the download list grows (100+) the browser gets unresponsible when downloading a number of files (10 or so). Afterclosing the download mgr it's ok again. I believe this is caused by the updating of the download progressbars. The number of items to update can be reduced by moving the completed items into a separate list (which then can be eaysily sorted, by name, date etc). Reproducible: Always Steps to Reproduce: 1. download a lot of files 2. download many files the same time 3. open download manager Actual Results: had to wait ;) Expected Results: should be responsible

So when you only download one or two single files (also when there are already 100+ items in download manager history) it's not slow?

In theory it is, but the number of refreshes is lower, so it doesn't break down response time that much. number of redraws = (total number of items)*(number of refresh requests) the number of refresh request depends on the number of active downloads and maybe it grows when the system gets busy - then fragment size gets smaller - then more refreshes.

The lockdown on the browser happens for some seconds after you start the download (doesnt matter if you have focus on the manager or not) and increases as the downloads list increases. Clearing the list solves the problem (not optimal solution? :D)

Confirming as feature request.

Instead of splitting into 2 separate windows/lists, perhaps a filter to show only "active" or "completed" (and "failed", "canceled"). Might be something for bug 377792.

Fixed by Bug 388517.

http://litmus.mozilla.org/show_test.cgi?id=4563 in-litmus+ (General testcase; used for Basic Functional Tests in the future; will fill in more tests with specific UI/functionality later...)

Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.9a8pre) Gecko/2007081304 Minefield/3.0a8pre Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9a8pre) Gecko/2007081305 Minefield/3.0a8pre Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a8pre) Gecko/2007081304 Minefield/3.0a8pre Separate impl./UI issues will be spun off into separate bugs. Verified FIXED.