allowing users to save .torrent files via `Save Link As`

Description

Currently the only way to save a .torrent file is by clicking on the download link, which will open a new tab and load webtorrent where you can click on Save Torrent File, which is annoying. Users should have the ability to download the .torrent file via the context menu without needed to go through webtorrent.

There’s currently no way of disabling webtorrent either so it’s currently a pain if you’re using another application for torrents.

Steps to Reproduce

1. open https://webtorrent.io/ in a new tab
2. right click on sintel.torrent and select Save Link As..

Actual result:

You’ll notice that instead of download the .torrent file, brave downloads the HTML Text link.

Expected result:

Should be able to download the .torrent file via Save Link As.. as other browsers.

Reproduces how often:

100% reproducible using the above STR.

Brave version (chrome://version info)

Brave	0.55.11 Chromium: 70.0.3538.35 (Official Build) beta(64-bit)
Revision	28dcb499844fa40c28d5f62e337876cb936f79f5-refs/branch-heads/3538@{#678}
OS	Mac OS X

Reproducible on current release:

• Does it reproduce on brave-browser dev/beta builds?

Yes, reproducible with the following builds/channels:

Brave	0.55.11 Chromium: 70.0.3538.35 (Official Build) beta(64-bit)
Revision	28dcb499844fa40c28d5f62e337876cb936f79f5-refs/branch-heads/3538@{#678}
OS	Mac OS X

Brave	0.56.2 Chromium: 70.0.3538.35 (Official Build) dev (64-bit)
Revision	28dcb499844fa40c28d5f62e337876cb936f79f5-refs/branch-heads/3538@{#678}
OS	Mac OS X

• Does it reproduce on browser-laptop?

Nope, Save Link As.. on .torrent links doesn’t seem to be working at all under 0.24.0.

[junkaccount]

+1 This is extremely annoying. I love that Brave has the torrent features built in, but I don’t want to use them on my seed box. I don’t want to go through all those extra clicks each time. I just want it to download and open the torrent file instantly like Chrome does. Feels like a step backwards if we can’t disable / bypass the torrent features.

[kjozwiak]

@feross agreed that it’s not terrible and shouldn’t block the 0.69.x release 👍I’m going to create a follow up issue and label this one as QA/No for the 0.69.x release. This way it will be a lot cleaner and easier to follow rather than opening this issue and having several PR’s that landed in different releases referenced.