Firefox

Update 2: Firefox 66.0.4 is now rolling out with a built-in fix for the problem of the extension.

Update 1: Mozilla has identified the problem and issued a fix for Firefox, Firefox Beta and Nightly. The update will be automatically applied in the background within the next few hours and bring back extensions to the original state. There is no action required by the users.

“Our team has identified and rolled-out a fix for all Firefox Desktop users on Release, Beta and Nightly. The fix will be automatically applied in the background within the next few hours. No active steps need to be taken to make add-ons work again,” the company said in a new blog post.

Mozilla is using Firefox’s Studies system to deliver the fix on short notice and the general fix is also being worked on. “We are working on a general fix that doesn’t use the Studies system and will keep this blog post updated accordingly,” Mozilla explains.

Original story follows below:

Users are reporting that a bug has disabled all Firefox add-ons (also known as extensions) and Mozilla has acknowledged the problem with its systems. The bug causes the Firefox browser to display an error message “One or more installed add-ons cannot be verified and have been disabled” above the extensions.

All popular extensions such as Dark Mode, LastPass, Ghostery, and others are affected due to the Firefox glitch. A Bugzilla post suggests that the problem is associated with the incorrect extension certificate signing. It means that Firefox extensions that are due signing have been marked as unsupported. In other words, extensions have been due to the expiration of intermediate signing cert.

“Yep, this just happened to me too. What sucks is that the only addon I was using was Ublock Origin, and that is listed as a FEATURED EXTENSION. I really don’t want to go back to Chrome (or Edge, God forbid),” a user wrote in a Reddit post.

Firefox extension bug

Another user revealed that Firefox also won’t let users re-download anything. If you try to re-download the affected extensions, you may receive a generic message that says the download has failed and check your internet connection.

Fortunately, a Reddit user has discovered a workaround to deal with the Firefox’s extensions glitch.

Fix extension could not be verified for use in Firefox and has been disabled error

  1. In the regular build of Firefox, go to about:debugging.
  2. Check the box to let Firefox start debugging the add-ons.
  3. Click ‘Load Temporary Add-On’
  4. Browse to your Firefox profile in appdata:
  5. C:\Users\<Username>\AppData\Roaming\Mozilla\Firefox\Profiles\<example text>.default\extensions
  6. In the extensions folder, you will find .xpi files.
  7. These files are actually the extensions that you had
  8. Load the extensions manually, but the extension may stop working if you close or restart Firefox.

The above workaround is working for many users and it could temporarily address the problem.

Mozilla is aware of the reports

In a Twitter thread, Mozilla acknowledged the Firefox extensions outage and the company said that an issue with a certificate may have disabled your add-ons.

As per the latest update, Mozilla has rolled out a Firefox update to address the extensions outage.

  • Nonya

    This happened on my computers that got a Firefox update installed this evening. This had better be fixed VERY QUICKLY, and fixed so that it never happens again!!!!! As you can tell. I am VERY PISSED OFF ABOUT THIS!!!!!!!!!!!!!!!!!!!!!!!!

    • Jero

      Firefox is the best web browser there is. Just give the team some
      time to fix the issue. Everyone is laughing at you being pissed off, hahaha.You suck, go use edge !

      • LJL Kunio

        Solo cambien la fecha de su PC por el 3/05/2019, problema solucionado.

    • Rimuru Tempest✓ᵛᵉʳᶦᶠᶦᵉᵈ

      It is better to be PISSED OFF then to be PISSED ON..

  • Nicholas La Rosa

    Yeah just happened to me a little while ago. I hope they get this fixed soon I don’t want to have to switch browsers.

  • bmx666

    you can set xpinstall.signatures.required to false and bypass this problem.

    • fade2gray

      Setting to false does not fix the inability to download and install addons.

  • EnglishRose

    Big problem here too – no ghostery and no adblock plus. I hope it can be fixed. I do not even being to understand the various fixes – I am nothing like competent to do those.

    • LJL Kunio

      Change date to 3/05/2019!! (fix).

  • Robert✓ᵛᵉʳᶦᶠᶦᵉᵈ

    I can’t download ad ons such as ablockers, have two laptops, one of them my adblockers are gone, the other still have them says download has failed, please check contention, my internet is working fine. the download feature is gone from the browser

  • William Blair

    Bandage (or fix): yandex => adguard; back fits to firefox. May be possible to adguard through Firefox. On with the war of the worlds.

  • fade2gray

    Mine’s just come back – relief

  • Carl Lucas

    why firefox have to update their crap without asking, even auto update is disabled. One second all is working, next its all crap.

    • RJWaters

      wasnt an update, was a security certificate expiring

      • winofiend

        I chose to install the addons, they shouldn’t need certificates.

        this is a croc.

        • Drakenfly

          So you love malware and viruses is what you’re saying, since it’s obvious that you’re clueless as to what the certs are for…

    • ­­

      LOL it was not an auto update. if it was just update just reverting would fix it.

  • FFuser

    I didn’t even update firefox, and all my add-ons are disabled!!!

    While on this page, I am also going to say that firefox has a bug in reading video file’s metadata. If you pass a video’s current scene to canvas, and the video is in portrait mode, you will get a weirdly rotated image on canvas. This only apply to video that is taken in portrait mode. This bug doesn’t appear in Chrome, Opera, and even Microsoft Edge, wtf firefox!

  • Tomtalker

    This is certainly NOT fixed by any means. Because quite honestly how many folks are using the Nightly version of Firefox…? I would gamble not that many. Right now and i’m sure MOST folks out their are waiting for a fix for Firefox Quantum platform 66.0.3 This is Mozilla’s problem i think we ALL know this so it’s up too them too fix them ASAP. I refuse too go over to Chrome, Opera, or any other browsing platform. I have been a staunch Firefox user for many years now probably since it’s inception. And looking back over the years this has got too be one of THE BIGGEST issues they’ve dealt with in some time now. People need easy access too updated information as well inside of hunting for it via the web. I went too Firefox main website where you can fill in the query form about your particular problem and give them your email address. I’m hoping they will update me and let me know via email once this is completely fixed I.E. for Quantum. I did manage too get my Ad Block Plus working again by changing the date method too an earlier time. But i highly doubt that will stick after today and i’ll have too re do it all over again.

    • Mayank Parmar

      Mozilla is rolling out a fix, it could be delivered automatically within a few hours.

      • Elizabeth

        It’s not fixed for me!

        • Alberta Cowgirl √Go Oilers

          Me either. Bunch of horse crap in my opinion!

        • Drakenfly

          Sorry but the potions used to fix the internet magically are not immediately available and it might actually take time to fix. I expect my plumber to automatically appear when my sink is heavily plugged to but it never seems to happen..

  • Lavinia Whateley

    Still not working. This has been an issue for several hours now. This problem (and others like it) would be mitigated if we could roll back updates. I’m particularly annoyed as many of the add-ons I use are privacy oriented, so effectively I cannot use Firefox for anything important until it is fixed. Boo. Boo. And thrice boo.

  • Elizabeth

    Still not working for me either! Now I am getting adds in my gmail account. Please fix!

  • Bill Plunkett

    I do not want now or ever in future for Mozilla to have control to decide what add on I can or cannot use! Butt out be a control freak some where else!

    • ­­

      lol and they are trying to carry the banner of free internet and transparent privacy policy.
      (but this current problem was bug)

      • Bill Plunkett

        A bug that was injected into firefox thru a invasive little item under
        privacy and security setting allowing them to change things on firefox
        without letting you know or without your permission. “Allow firefox to
        install and run studies!” and they have it turned on by default so you find out about it like this unless you scan thru everything every time you update firefox

        • ­­

          For me it was not turn on by default. I had to search for studies in option and config to find it out

  • Alberta Cowgirl √Go Oilers

    3:16 pm mountain me. No instructions here. Not working. Should Ice Dragon ( based on Firefox) be left running for hours, like the next 100 or so in the background while I use my other browser, Opera? All my important stuff is in my FVD speed dial add on. I need it back!

  • helloWorld

    well, this just made me switch to pale moon.

    • helloWorld

      just tried firefox developer. it works there

  • Drakenfly

    Just a FYI to those who think Mozilla is intentionally trying to stop or prevent you from downloading anything or doing anything. This has been identified as a BUG in Mozilla that has caused a GLITCH in Firefox. Unlike what some people think that Mozilla and Firefox are trying to stop people from using addons…

    • Bill Plunkett

      A bug that was injected into firefox thru a invasive little item under privacy and security setting allowing them to change things on firefox without letting you know or without your permission. “Allow firefox to install and run studies!” that is checked by default.

      • JustMega

        I have ALWAYS turned off that option yet my adblock(s) took a dump also. Wrong again, Chicken Little.

        • Bill Plunkett

          then how did it magically just happen without downloading something yourself I also don’t enable it and I don’t allow upgrades but this bug just installed itself and disabled my addon must be magic

          • me

            this bug just installed itself

            WRONG. A security certificate expired, and Firefox automatically disabled extensions which it could not validate (which is a security feature.)

          • Bill Plunkett

            No everything was current on my end and I was using a older version of firefox and had disabled updates and everything I could turn off. And still I got hit with this bug. So it brings into question how everything on my Firefox got shut down without nothing turned on supposedly on my end to allow something like this to happen…..a back door? Maybe for good old uncle sam to have access? Some of the add ons were scripts they don’t expire ever but they were shut down as well. I have since stopped using Firefox I no longer trust it.

        • Bill Plunkett

          As did I but it shut down 5 add ons one running a script all were upto date I don’t allow firefox to do updates. So I had a older version of firefox, no updates, every thing turned off and I still got the bug sounds very questionable how did I get hit with this? I will not ever use firefox again sounds too much like Microsoft we put this back door in for your own good so we can force you to have what we deem important…..or the government can look in on you if needed.

  • Gaylord Modos

    that’s a pretty pathetic error. I was contemplating ditching FF for good if you disable ublock and stuff…

    • Alberta Cowgirl √Go Oilers

      Dump this worthless shit. I have.

  • Alberta Cowgirl √Go Oilers

    Have left fire fox and computer on all day. No fix yet.

  • Brigid

    ok, as I sit here, the toolbar just refreshed and blinked, and my beloved add-ons magically reapeared! Thank you Mozilla devs worldwide!

    • ­­

      …….. didn’t happened for me it is still disabled

      • Bill Plunkett

        you have to enable their invasive: Allow firefox to run studies under privacy and security Which is a way for them to change things without telling you or any input from you

    • Alberta Cowgirl √Go Oilers

      Your fucking lucky! Dump this crap before it happens again!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

      • sonnyboy1

        DIdn’t work for me, Alberta. You’re lucky.

  • tjitah

    Mine is still disabled

    • OneDunya

      Same here

  • OneDunya

    I have been using FF for over 10 years without the add-ons it is pretty much a useless browser. That is the only reason it has been my primary browser all this time. I guess I will stick to Safari, bye FF it was a nice run. How could they have messed up so badly someone needs to be fired!?

    • Alberta Cowgirl √Go Oilers

      Dump it unless you want to see it happen again. Has been taken over by high school kids.

      • OneDunya

        The update fixed all the issues thank God. I am on Mac OS and I prefer FF to Safari!

        • Alberta Cowgirl √Go Oilers

          Mine never updated but about:config fixed it.

  • ben franklin

    This temporary fix worked for me in FF stable:

    Set
    the preference xpinstall.signatures.required to false as Martin
    suggests above, then go to about:debugging. Check the box to enable
    add-on debugging. Then click Load Temporary Add-On. Browse to your
    Firefox profile in appdata:

    C:Users\AppDataRoamingMozillaFirefoxProfiles.defaultextensions

    In
    the extensions folder there are .xpi files, those are your extensions
    that you had. Load each one and don’t close Firefox until they fix this.

    [copied from Reddit Firefox user feanturi]

    • Alberta Cowgirl √Go Oilers

      Thanks, you guys are so sweet.

  • Alberta Cowgirl √Go Oilers

    Firefox updated the fix but Commodo Ice Dragon which is built on firefox did not.. Am switching to opera . This program is worthless CRAP. SWITCHED TO OPERA THIS MORNING. Good fucking riddance to a program I had used for ten years. Run by high school kids.

  • WIN505

    Quick easy fix:
    1. Options | Privacy | Firefox Data Collection | Allow Firefox to install and run studies = enable
    2. Exit Firefox & restart
    3. Open new tab, type “about:studies
    you should see: hotfix-update-xpi-signing-intermediate-bug-1548973 (active)
    extensions should now be working again

    • Gianluigi Villecco

      I have everything active like you posted, and my addons continues to not work. What can i do? T_T

    • Alberta Cowgirl √Go Oilers

      Put my ghost image back on with Firefox. Never smoked the weed but calmed down when back from horse ride. Found the fix on comodo ice dragon forum.
      it worked fine.

      about:config put in url address line
      scroll down or search for the word “required” without ” by hitting ctrl f

      xp.signature.required change true to false by clicking on the line.

      • WIN505

        If the hotfix was not present and you could not wait a few hours for it to appear, I understand. I only suggested the “studies” method because Mozilla will automatically restore the correct settings later, when the certificate signing issue is properly resolved. If you manually edit the configuration, you will need to remember to manually restore it later, or you will be operating in a reduced security mode.

        • Alberta Cowgirl √Go Oilers

          My version is Ice Dragon built on Fire Fox but Comodo took the studies option out apparently for security reasons.

  • Alberta Cowgirl √Go Oilers

    Weed is legal here in Canada and this could drive me to trying some of it. Thanks so much for the suggestion but I am taking a nice break after church and go horse riding the rest of the day to calm down! Opera is still working fine.

  • The “studies” just need to be activated once, after restarting the browser it can be deactivated when you see that it works again. Worked for me anyway (not on Android though, but there’s a temp fix for it by disabling xpi cert checks).

    • JustMega

      I concur. This fixed the issue.

  • JustMega

    For all the conspiracy ‘nuts’ complaining that Mozilla is nefariously doing this it’s much more likely they are being attacked for their privacy stance. ‘They’ would rather you use Chrome or IE or Safari which are ‘their’ tools. Another example of going against the crowd is the restaurant chain Chipotle. They have taken a pledge to be completely non-GMO/organic so ‘they’ sabotage their food supply periodically causing food borne illness scares. That’s not always the reason as one Ahole not washing their hands or a careless one somewhere up the food supply chain can easily be the cause.

    • guest

      People should be paranoid about Chrome because it really does spy on you every way that it can. But the average user does not understand how extension validation/certificate signing works, and why it is such a disaster when someone forgets to renew the cert before it expires. This was indeed a careless mistake by someone at Mozilla… but they definitely are not spying, it really is a security feature.

      • MaxMcByte

        *** This is BS! Dump Firefox. Try something else. ***

        Mozilla was once trustworthy BUT NOT ANY MORE!

        try WaterFox, an open-source based on Firefox with support for legacy extensions and more.

    • Spike Equinus

      I stopped reading after “nuts”. If you want your opinion to be taking semi-seriously, try to avoid the “argumentum ad hominem” approach and remain objective, and avoid name calling.

      You could have the best idea in the world; but, if your delviery system sucks…no one listens.

  • Romuska Palo Ur Laputa

    This is not working for me as I can’t even find my “C:UsersAppDataRoamingMozillaFirefoxProfiles.defaultextensions” thingy. I do hope these fixes come soon, otherwise, I’m done with Firefox.

    • guest

      If you search this thread for “Quick easy fix” you will see the solution

      • Mike Gilmer

        That does not work for those of us using an older version of FF. I use 54.01 for several reasons and the Quick Easy Fix is not available.

        • sonnyboy1

          Same here, Mike. I’m using FF 56.0.2. I’ve tried to download Quantum 5 times before giving up. Oh, it downloaded, but nothing worked. Pages wouldn’t load, no links would open, NOTHING! Had to do the system restore each time. I found several links about how to fix this, but I’m going on 78 and not that computer ‘savvy’ to mess around with backing up profiles, bookmarks, etc. Nor can I afford to take the pc to a computer geek to do it for me. I have over 30 RSS feeds on my homepage, 200 bookmarks, etc.

  • guest

    why are you using an old version of Firefox? you are missing many important security patches!

    • Mike Gilmer

      Because some of us have legacy add-ons that are essential to our businesses.

    • Alberta Cowgirl √Go Oilers

      He or she may be using XP. I have it on one of my XP computers and I believe that is the last version of Firefox that will work on xp.

  • Mike Gilmer

    OK, FF is now crap. Chrome is a spy machine. What browser should I go to?

    • Alberta Cowgirl √Go Oilers

      Scroll down to Alberta Cowgirl discussing about:config

      fix worked when the hotfix never showed up for me.

      • Mike Gilmer

        Does not work on Firefox 54.

        • Alberta Cowgirl √Go Oilers

          If not on XP or Vista you can update to a later version of Firefox and then fix it if auto fix does not.

          • Mike Gilmer

            I use Windows 7 64 bit and did use Firefox 54.01 64 bit. Apparently Mozilla has taken the Apple model for their products and closed their system to users. I guess I will have to wait until somebody jailbreaks Firefox to allow us ignorant peons (as Mozilla apparently considers us) to use whatever add-ons we want.

          • Alberta Cowgirl √Go Oilers

            I used older versions of Opera and Firefox for years till my add ons forced me to upgrade. I only upgraded to Windows 7 a year ago! My computers are taken good care of and last for five to ten years.

          • Mike Gilmer

            MIne too. I did not upgrade past XP until after Windows 10 came out. I hate being dictated to by tech companies, especially those like Mozilla who claim to be for the people. In fact, they are no different than Apple who upgrades their phones and computers regularly so you cannot use apps or programs they do not approve of. Mozilla does this with Firefox. I only hope someone will jailbreak Firefox so we can use whatever add-ons we wish.

    • John Schneider

      I’ve been playing with Vivaldi for a few months and really like it.

      BTW, 66.0.4 fixed the extension issue for me

      • guest

        Vivaldi has a very nice user interface but its also very buggy and slow. It may freeze under low memory conditions, menu items stop working, and desktop shortcuts cannot be created for many web sites.

        • John Schneider

          Very Interesting. I’m not seeing any of those issues. I’ve been running it on a Windows 7 Ultimate and Windows 10 machines. I find it to be very fast and rock solid.

    • MaxMcByte

      I started using Brave, and open-source based on Chromium and will now try WaterFox,
      and open-source based on Firefox with support for legacy extensions and more.

  • Beaula

    “Now fixed?” BS, it is not

  • guest

    I think they are just deploying updates gradually to reduce the load on the server

  • Mayank Parmar

    Firefox 66.0.4 is now out with proper fix!

    • MaxMcByte

      *** This is BS! Dump Firefox. Try something else. ***

      Mozilla was once trustworthy BUT NOT ANY MORE!

    • Spike Equinus

      The “MOD” is telling fibs, fibs, fibs

  • Drakkenfyre

    “Now fixed”

    Bwahahaha. The issued fix was a workaround and only worked for some people, Android and Linux versions are still out in the cold, and anyone on anything pre-63 has to wait until Monday according to a nebulous “Fixes for older versions ETA Monday” tweet.

    Declaring it “now fixed” just because Mozilla released a temporary workaround that doesn’t even work for everyone shows zero research into the topic.

  • Romuska Palo Ur Laputa

    It’s still not fucking working for me on my Windows 8 laptop. You liars. Do your job and FIX the problem or you’ll be having an exodus from your browser.

    • MaxMcByte

      This is BS! Dump Firefox. Try something else.

      Mozilla was once trustworthy BUT NOT ANY MORE!

  • david

    what a shit I can’t believe. Nothing has been fixed after 48 hours

    • Mayank Parmar

      Can you install Firefox 66.0.4? It does fix the issue.

      • Spike Equinus

        No it doesn’t

        LIES LIES LIES

  • sigsegv111.americké morče

    this is BIG BIG BIG ISSUE with much wider scope ..

    this explicitly proves, that Moz can remotely control/modify/patch the behaviour (and/or code of (extensions and) firefox components) even when you have disabled for privacy/security reasons things from developer/security settings like sharing experience or those `studios’ scam enabled ..

    this is principally same racketeering behaviour like `hey, we’ve managed to encrypt your data, do THIS or THAT in order to get a key’

  • sonnyboy1

    Right you are, Passerby. Some of my favorite website are nearly unusable due to the ads.

  • MaxMcByte

    This is BS! Dump Firefox. Try something else.

    I started using Brave, and open-source based on Chromium and will now try WaterFox,
    and open-source based on Firefox with support for legacy extensions and more.

    Mozilla was once trustworthy BUT NOT ANY MORE!

  • MaxMcByte

    This is BS! Dump Firefox. Try something else

  • Spike Equinus

    emm… no it is NOT fixed as of 26/05.

    I had been runnning 56.0 in order to continue using my add-ons. Everything was disabled, Somehow Mozilla managed to slip this one under the radar.

    For their insolence, I uninstalled FF.

    Without the add-ons, my dear fellows at Mozilla Team, Im afraid you have nothing new/different to offer, except of course, completing destroying ALL my speed dials.

    Kinda Malware approach if you ask me. If I wanted this sort of treatment, I’d have gotten an Apple.

  • Spike Equinus

    Lies. I tried upgrading to latest to get at least my speed dials back and NOT ONE ADD-ON was even listed.

  • Chris Down

    LIES but what can you expect from MSM articles these days? Mozilla has fully gone Far-Left, and they are just following the orders of their corporate masters in silicon valley. They got no evidence, just opinions. This was on purpose, and they are being TOLD to disable all extensions that stop ads, or stop tracking, or ELSE! So, they do what they say. Get off FF, find another browser, not too hard. Mozilla, i think was secretly bought out, and they kept it hush, so they can then set-up this situation to look like a issue that will nose dive ff into the ground, when in fact, it’s a controlled demolition of the company so Chrome can take over. Don’t believe these knuckle heads folks. They disabled AdBlock Plus all the time, you restart, its gone, you enable, it shuts off again, they claim its a security risk, with NO EVIDENCE at all, and they just ok it without any discussion with the said company who made the plugin, or the customers. F**K you guys, hard! at Mozilla.