Comment 2 for bug 731865

User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; WOW64; Trident/4.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.0.30618; .NET CLR 3.5.30729)
Build Identifier: 3.6

Hi,

We have a PDF-Reader plugin that works great with Firefox 3.6 and have successfully supplied this to our clients for multiple years. We have been receiving many support emails and calls lately and I can confirm the following behaviour. If Adobe Reader and our PDF Viewer plugin are both installed the Adobe Reader plugin disable button doesn't work. Many of our users install both programs but unless Adobe Reader is completely uninstalled from the computer it will override user preferences and ignore the disable and infact if firefox is restarted and you go back into the Addin->Plugins menu the Adobe Reader plugin shows as still enabled. So obviously this is a bug that needs to be resolved and I am wondering when such a fix could be available?

Many thanks,
Chris Attrell
Sales & Support
Tracker Software Products
http://www.docu-track.com

Reproducible: Always

Steps to Reproduce:
1.Install Adobe Reader
2.Install PDF-XChange Viewer: http://www.docu-track.com/download/PDFXVwer.zip
3.During installation accept PDF-XChange Viewer as default PDF Viewer and Dispaly in Browser options
3.5 Open an online PDF. (Adobe Reader plugin opens document)
4.Goto Tools->ManageAdd-ins->plugins and disable the Adobe Reader and accept; and Restart Firefox
5.First return to Tools->ManageAdd-ins->plugins and you'll see the Adobe Reader is still enabled. Close Firefox
6.In the Adobe Reader preferences uncheck the display in browser option and close reader
7. Again Open Firefox, Tools->ManageAdd-ins->plugins and you'll see the Adobe Reader is still enabled
8.Uninstall Adobe Reader and start firefox 3.6 and open online PDF (PDF-XChange plugin will finally be initiated)

Actual Results:
After Step 4. Adobe Reader has not been disabled.
After Step 6. Adobe Reader has not been disabled.
Only after uninstalling Adobe Reader completely can Firefox initiate the PDF-XChange Viewer plugin. Which works great

Expected Results:
After Step 4. Firefox 3.6 should show the Adobe Reader Plugin as disabled and initate the PDF-XChange Viewer Plugin for online viewing of PDF files

After Step 6. Firefox 3.6 should show the Adobe Reader Plugin as disabled and initate the PDF-XChange Viewer Plugin for online viewing of PDF files

Self explanatory.