Background

There are a couple of problems existing in the way we do downloads right now that affect users in various ways:

there is much code duplication relating to file and path name validation in the browser and external helper app service due to the lack of a simple API for file transfer that coalesces all such code. This results in bloat and multiple sites to consider when addressing security issues.
performance of the download list is sluggish when the download history is long.
- Could use a different default setting for when to clear the downloads history
download Manager does not support Torrents or similar distributed downloading systems
Add a checkbox option in Options dialog/General/download like "Show download dialog while opening a file" to don't display systematically download dialog when you are only opening a file like a JNLP file. This option could be unchecked by default.