Cannot install vlc web plugin

[donp...@gmail.com]

Running Windows 7 Pro on HP z230. Using Firefox version 45.0.1

Installed vlc-222-win32.exe. I made sure the Firefox web plugin option was checked.
When I open Firefox, the VLC web plugin is NOT installed.

What must be done to install the VLC Firefox web plugin?

[Good Guy]

Have you enabled it in FF.  Installation itself does not enable it in FF by default.  You need to go to:

Tools >> Add-Ons >> Extensions

Now check if VLC is enabled there.  If not enable it.

I don't use this plugin but my response is based on general Add-ons and how they work in FF.

Good luck.

[Revvie Quar]

Correction: you'll find it (or should) in Tools<Add-ons<Plugins

--
Revvie Quar

Gryphons *RAWK!*

[donp...@gmail.com]

Hello Good Guy:
VLC plug in is NOT in Extensions. Nothing is in Extensions.
VLC plug in is NOT in Plugins either.
How do I get VLC plugin to install? As I said, I made sure this option was checked when installing VLC

[Mayayana]

| VLC plug in is NOT in Extensions. Nothing is in Extensions.
| VLC plug in is NOT in Plugins either.
| How do I get VLC plugin to install? As I said, I made sure this option
was checked when installing VLC
|

I don't use plugins, but I tested VLC and it worked
fine. It installed npvlc.dll and npvlc.dll.manifest to
C:\Program Files\VideoLAN\VLC. I then ran Filemon to
see what FF is doing. When FF loads it's looking in
various places for plugins. It seems the Mozilla people
have broken their system at least once, originally putting
plugins in a plugins folder that no longer exists. The
actual trigger to load the plugin was pluginreg.dat, in
the app data profile folder. That file should list info
about VLC. If it's not there perhaps you can copy it
from someone else. (But first check blocklist.dat,
explained below.)

I don't know what else might go wrong, but 2 ideas
to look into would be UAC file restriction problems or
32/64 issues. That is, you can't load a 32-bit DLL in
a 64-bit process. So if VLC is 32-bit then FF needs to
be 32-bit. (Does FF even have a 64-bit version? I
don't know.)

Another possibility is a file called blocklist.dat. I find
it in both the program folder and the app data profile
folder. Blocklist.dat seems to contain a record of what
versions of what things can be installed. A kind of
ninny-list of possible security concerns. Here's what
I see in my blocklist.dat:

<match name="filename" exp="npvlc\.dll" /> <versionRange minVersion="0"
maxVersion="2.0.5" severity="0" vulnerabilitystatus="1"></versionRange>

I happen to have VLC 2.0.5 because I had trouble
with jumpy video when I installed a later version.
Where did blockilist.dat get 2.0.5? I don't know.
Maybe there's a good reason for it. Maybe not. I'm
guessing it's probably an irrelevant entry that just
corresponds with the version of VLC current at the
time the FF installer was written. (Extensions have
a similar system. An XPI may refuse to install based on
the min/max FF version info embedded in the XPI, but
that info is not necessarily relevant.)

If you tried other things and find a similar npvlc
entry in your blocklist.dat then you might try either
installing VLC 2.0.5, or editing your blocklist.dat
files to prevent interference, then re-install VLC 2.2.2.

[WaltS48]

On 04/19/2016 09:43 AM, Mayayana wrote:
> Where did blockilist.dat get 2.0.5? I don't know.
> Maybe there's a good reason for it.

<https://addons.mozilla.org/en-US/firefox/blocked/p456>

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[»Q«]

In
<news:mailman.514.1461073502...@lists.mozilla.org>,

"Mayayana" <maya...@invalid.nospam> wrote:

> (Does FF even have a 64-bit version? I don't know.)

Yes, and only a few plugins will work with the Windows 64-bit builds;
VLC's plugin isn't one of them, so the only way to use the VLC plugin
with Firefox on Windows is to have 32-bit builds of both.

[Mayayana]

| > Where did blockilist.dat get 2.0.5? I don't know.
| > Maybe there's a good reason for it.
|
| <https://addons.mozilla.org/en-US/firefox/blocked/p456>

So the max version in blocklist represents the
max blocked version? Good to know. I guess that
probably doesn't explain the OP's problem, then.

[B00ze]

On 2016-04-19 09:43, Mayayana <maya...@invalid.nospam> wrote:

> | VLC plug in is NOT in Extensions. Nothing is in Extensions.
> | VLC plug in is NOT in Plugins either.
> | How do I get VLC plugin to install? As I said, I made sure this
> | option was checked when installing VLC
> |
>
> I don't use plugins, but I tested VLC and it worked
> fine. It installed npvlc.dll and npvlc.dll.manifest to
> C:\Program Files\VideoLAN\VLC. I then ran Filemon to
> see what FF is doing. When FF loads it's looking in
> various places for plugins. It seems the Mozilla people
> have broken their system at least once, originally putting
> plugins in a plugins folder that no longer exists. The
> actual trigger to load the plugin was pluginreg.dat, in
> the app data profile folder. That file should list info
> about VLC. If it's not there perhaps you can copy it
> from someone else. (But first check blocklist.dat,
> explained below.)

Thanks for the DLL.

Donpick9 can copy it to the Plugins folder in the base Firefox install
folder, and enable the old behaviour so that the DLL is loaded with
this: user_pref("plugins.load_appdir_plugins", true);

Regards,

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