Why are video downloader add-ons so popular?

Bill McCloskey wmccloskey at mozilla.com
Tue Jun 9 19:03:30 UTC 2015

Having looked at a couple of these add-ons, the code is usually pretty
site-specific. They often have a script that gets loaded for each different
video site: YouTube, Vimeo, Daily Motion, etc. A lot of times these scripts
muck with the URL and do other stuff that probably needs to be updated
frequently as the sites change. It's probably not the sort of thing we want
to put in Firefox.

I suspect that a lot of these hacks are needed because it's hard to get the
video out of the Flash object without doing some sort of fancy analysis. I
would hope HTML5 is better for this, but MSE probably makes it more
difficult. Maybe some media people have ideas on how we could do better


On Tue, Jun 9, 2015 at 10:45 AM, Aaron Klotz <aklotz at mozilla.com> wrote:

> On 6/9/2015 10:04 AM, Masayuki Nakano wrote:
>> FYI: One of the most popular video download add-ons, Video
>> DownloadHelper,  causes serious performance issue. I see some users who
>> believe the performance issue is Firefox's trying to switch to Google
>> Chrome.
>> https://bugzilla.mozilla.org/show_bug.cgi?id=1172200
>> So, if we could include popular feature, it would be good thing for
>> avoiding bad UX caused by add-on compatibility.
> Furthermore, these add-ons obviously reach into content. Some of them are
> e10s-aware, but many of them are not.
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