blocked by Firefox anti-malware systems




3 years ago
10 months ago


(Reporter: wiki, Unassigned)


43 Branch

Firefox Tracking Flags

(Not tracked)




3 years ago
User Agent: Mozilla/5.0 (Windows NT 5.1; rv:43.0) Gecko/20100101 Firefox/43.0
Build ID: 20151208100201

Steps to reproduce:

Tools -> Addons -> Get-Add-Ons  selected an AddOn to install.. and clicked install...

Actual results:

Firefox popped an error to indicate it had blocked from installing software. 

Expected results:

The add on should have started it's installation process without further intervention.

Comment 1

3 years ago
WFM, could you test with a fresh profile.
Tried to reproduce this bug with latest Nightly 46.0a1 (2015-12-20) but failed to reproduce on Windows 7, 64 Bit!

Add On Installation Process was started in a normal way.

I suggest you to reproduce this bug on Latest Nightly with a new profile[1] and also try to do with safe mode[2].


If this bug is still happening with you, Can you check if extension installation is happening in other browsers than Firefox ?

Moving to a better component, so that this can get better attention!
Component: Untriaged → Extension Compatibility
Flags: needinfo?(wiki)

Comment 3

3 years ago
Setting an exception appears to temporarily solve this issue, and recent updated in 43.01 appear to have rendered this moot.  Recomend closing this unless it recurs.
Flags: needinfo?(wiki)
Thanks for this Reply!

Closing this, As reporter is no longer reproducing the issue!

Please, re open, if it is happening again!
Last Resolved: 3 years ago
Resolution: --- → WORKSFORME

Comment 5

10 months ago
Using Firefox 52.7.3
Using Norton Internet Security
Try to download eg: ImportExportTools

Norton does not allow the download saying 'Malicious download detected' in a pop up.
This was reported in a help forum, so as I use the same NIS product, I tested and got same results.

I'm not being told the website is unsafe, just the downloads from the website.
In NIS: Turning off 'Download Intelligence' does not allow download - you get same  'Malicious download detected' issue.
You have to turn off both 'Browser Protection' AND 'Download Intelligence' to OFF.

Then restart the browser, at this point the 'Restore previous session' is then lost. 
You have to use the 'Recently closed tabs' > 'Restore closed tabs' option to get everything back and then download the file.
then in NIS switch everything back on unless you have it operating on a timer.

Nor sure if this is something which can be done here, but you need to be aware there is a problem or maybe contact Norton to discover what is going on to cause their product to block downloads.
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