129077 - should ignore duplicate plugins

Status: VERIFIED WORKSFORME

(Core Graveyard :: Plug-ins, defect)

Description

[Henrik Gemal]

i about:plugins I have:

Shockwave Flash 6.0 r2
C:\Program Files\mozilla.org\Mozilla\Plugins\NPSWF32.dll

and

C:\Program Files\Netscape\Communicator\Program\Plugins\NPSWF32.dll
Shockwave Flash 5.0 r41

Mozilla should ignore duplicate plugins like this!

20020304

Comment 1

[Boris Zbarsky [:bzbarsky]]

We can't tell they're duplicates, since they're actually different versions....
if they were the same version, one would get ignored.

Comment 2

[Henrik Gemal]

what are the creteria for ignore? Same MIME type, same filename, same description?

Comment 3

[Peter Lubczynski]

Flash 6 and Flash 4 are not duplicates. 

See |nsPluginTag::Equals|:
http://lxr.mozilla.org/mozilla/source/modules/plugin/base/src/nsPluginHostImpl.cpp#1094

Comment 4

[Henrik Gemal]

so how does Mozilla figur out which plugin to use?
Both Flash 6 and Flash 5 say they play the same MIME types...
And I'd like to be 100% sure that it's Flash 6 that plays everything...

Comment 5

[Peter Lubczynski]

The order in which plugins will be used should correspond with the order in
about:plugins. If picked up from the 4.x folder, Flash 5 should have the lowest
priority and only used if Flash 6 wasn't found.

Comment 6

[Henrik Gemal]

ok. not sure that I agree. I cant really see any valid reason do load a old
version of a plugin that already loaded.

Comment 7

[Peter Lubczynski]

The problem is that we can not tell that it is an "old version". Web pages sniff
out plugin version based on the kind of plugin.