I have available update, but NO ADDON LISTED. I suspect, that I have a hidden malicious addon. What should I do?
OS: Debian 11 Firefox version: 108.0.1 64-bit
All updates must be approved manually by me. It was long time since I last updated my addons, so I don't know for how long this hypothetical hidden addon was on my browser. To be sure, I removed literally all addons that I have installed, yet in its GUI Firefox still displays that there update available. Firefox itself is already updated to the latest version, I checked it.
I write these words from different computer, using brand-new Firefox profile. I also haven't noticed any strange behaviors on my original computer.
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Sometimes I see a higher number than expected. I suspect this is due to an extension having multiple updates since my last update. Is there a way to determine exactly what is going on? Nothing is leaping out me.
To check a different view of your installed extensions, use the Troubleshooting Information page. Either:
- "3-bar" menu button > Help > More Troubleshooting Information
- (menu bar) Help > More Troubleshooting Information
- type or paste about:support in the address bar and press Enter
Scroll down to the "Add-ons" table. Normally a new install will have a bunch of Firefox search engine extensions (ID ends with "@search.mozilla.org") and "addons-search-detection@mozilla.com".
Do you see any mysteries on this list?
>Do you see any mysteries on this list?
No, I don't.
>I suspect this is due to an extension having multiple updates since my last update.
As I already said, I removed all extensions I installed. IMHO, if there was an update to any of them, it would have disappeared.
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Try clearing the startup cache in case this information somehow ends up in there. On the Troubleshooting Information page, there is a button for it in the upper right under the heading Try clearing the startup cache -- note: this does restart Firefox.
In your Firefox profile folder, there is a file named extensions.json that you also could compare with the other lists. You can simply drop this file into a tab to get a structured view, or you can use my extractor tools to make it a bit more readable:
https://www.jeffersonscher.com/ffu/extensionsjson.html
Ref. for accessing the profile folder using the Troubleshooting Information page: Profiles - Where Firefox stores your bookmarks, passwords and other user data.
Have you clicked on the button to see what the update is? Could it be a language pack?
I checked extensions.json, but didn't find find anything suspicious
>Have you clicked on the button to see what the update is?
The screenshot that I attached already shows results of clicking on "available updates". As you can see, there is nothing.
After I restarted the browser this notification about available update disappeared. I think I will treat it as a GUI glitch. Although I nuked my profile, removed ~/.mozilla and reinstalled the browser, just in case.