672094 - Addon-Plugins are not loading on first run of the upgraded Firefox

Status: RESOLVED WORKSFORME

(Core Graveyard :: Plug-ins, defect)

Description

[Manoj]

Attachment: test.zip (testplugin.xpi & testplugin.html)

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.122 Safari/534.30

Steps to reproduce:

In our addon we have two plugins and we noticed Firefox is not loading those plugins on first run after Firefox upgrade/downgrade. Once we restart it again after first run everything works as normal. We also noticed plugins are loading if we fire "about:plugins" on first run.

Please find attached sample xpi and html page to check plugin.

Steps to reproduce this issue:

Method - 1
1. Install FF version-X (say 4.0 or 5.0)
2. Install addon - TestPlugin
3. Open testplugin.html - Everything is fine
4. Install FF version-Y(say 5.0 or 4.0)
5. Open test.html - FF will report "additional plugins are required to display all the media in this page" 
6. Close FF and start again
7. Open testplugin.html - Everything is fine


Method - 2: 
1. Install FF version-X (say 4.0 or 5.0)
2. Install addon - TestPlugin
3. Open testplugin.html - Everything is fine
4. Install FF version-Y(say 5.0 or 4.0)
5. Open testplugin.html - FF will report  "additional plugins are required to display all the media in this page"
6. Open another tab and issue "about:plugins"
7. Open testplugin.html in another tab - Everything is fine


Actual results:

Addon-Plugins are not loading on first run of the upgraded Firefox


Expected results:

Addon-Plugins should loading on first run of the upgraded Firefox

Comment 1

[Manoj]

The sample plugin is npruntime example given in http://mxr.mozilla.org/seamonkey/source/modules/plugin/samples/npruntime/

Comment 2

[Benjamin Smedberg]

Josh/Mossop: I suspect that we are scanning for new plugins before extensions are enabled in the startup process, but I'm not sure about this. Josh, we do scan on every startup, right? Where does that happen?

Comment 3

[Josh Aas]

I don't think we scan on startup every time. To force a scan after installing a plugin you can use the js method "navigator.plugins.refresh".

Comment 4

[Manoj]

We are facing this issue when Firefox is upgraded, not when extension upgraded.

Comment 5

[Manoj]

I think we need to scan for plugins on first startup after Firefox upgrade.