286665 - unable to download .exe files, and unable to install extensions from within Firefox

Status: VERIFIED DUPLICATE of bug 287471

(Toolkit :: Add-ons Manager, defect)

Description

[hpsempfi]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.6) Gecko/20050225 Firefox/1.0.1 StumbleUpon/1.9992
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.6) Gecko/20050225 Firefox/1.0.1 StumbleUpon/1.9992

Any time i attempt to download an .exe or other downloadable file, i get the
message that "this object has been blocked" appears where the browser page is.
I've enabled pages to download content but it hasn't helped

Also, when ever i attempt to download any extention install files, i get the
message that it couldn't be intalled because "not a valid installation package"
and i've asked for live support but no one can figure it out

CPU: Athlon XP 2500+
Mem: 512 MB
OS: XP SP2

thanks for any help

Reproducible: Always

Steps to Reproduce:
1.go to addons.update.mozilla.org
2.click on a Firefox extention's name
3.click "Install now"
4.select intall from the message box


Actual Results:  
says "Firefox could not download the file at [URL of .xpi file] because: it is
not a valid installation package"

Expected Results:  
shown that it would be installed after firefox restarted

Comment 1

[Nickolay_Ponomarev]

Check if your firewall, antivirus software or your ISP or whatever you use to
connect to the internet blocks exe/xpi files.

Comment 2

[Nickolay_Ponomarev]

well, afaik Firefox doesn't produce messages like "this object has been blocked"

Comment 3

[OstGote!]

*** This bug has been marked as a duplicate of 287471 ***

Comment 4

[Nickolay_Ponomarev]

for the record, in bug 287471 it's said to be because of ZoneAlarm software.