This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Echekwara usoro a. Biko jụọ ajụjụ ọhụrụ ma ọ bụrụ na ị chọrọ enyemaka.

Firefox extensions safety

  • 2
  • 1 nwere nsogbu anwere nsogbu a
  • 1 view
  • Nzaghachi ikpeazụ nke capybara

capybara
capybara
more options

OK guys, here is the question.

Lets say I installed some extension, it seemed harmless, did it job just fine. I tried functionality and then just removed extension from Firefox.

two questions here: 1) Is it possible that extension was spyware? (I suppose the answer is always "could be"). 2) Can it do any harm after you removed the extension even if it was malicious software?

Thanks for your help everyone.

OK guys, here is the question. Lets say I installed some extension, it seemed harmless, did it job just fine. I tried functionality and then just removed extension from Firefox. two questions here: 1) Is it possible that extension was spyware? (I suppose the answer is always "could be"). 2) Can it do any harm after you removed the extension even if it was malicious software? Thanks for your help everyone.

All Replies (2)

the-edmeister
the-edmeister
  • Moderator
more options

1) That may depend on where you obtained that extension. But overall very doubtful that is could cause long term problems, with the current "WebExtensions" format that Firefox is using since Firefox 57 Quantum was released in November 2017.

2) Very doubtful, plus any Firefox WebExtension from anywhere would need to be "digitally signed" in order for Firefox to even install it. And that "signing" process is carefully controlled by Mozilla. Plus Mozilla can disabled any WebExtension at any time if that extension is found to be malicious or found to be "spyware"; after the fact. A 'check' for such is done everytime that Firefox is opened to be used.

And with Mac OS's that would be very a very rare occurrence.

capybara
capybara Jụọ onye nwe ya ajụjụ
more options

I'm talking about this particular extension here:

https://addons.mozilla.org/en-US/firefox/addon/almonit/

what concerns me is the following:

1) There is message underneath "This is not monitored for security through Mozilla's Recommended Extensions program. Make sure you trust it before installing."

2) There are only 2 positive reviews

3) All people who are supposedly be key developers have broken links to their github.

4) all key developers listed on extension page joined very recently

5) if you open github itself I have to admit, that some work is done, but that does not mean that, the extension itself is harmless

does it change your opinion in the light of that information?