This was a great extension before the clipboard monitoring feature was introduced. This feature does not work properly and constantly replaces the clipboard content with “[⚠️ Suspicious Content]”.

Please provide the option to disable the feature because the extension has become unusable. I also tried disabling the “Get data from the clipboard” and “Input data to the clipboard” permissions from the Firefox settings, but it doesn't work. This is a serious problem.

I also tried sending an email to support@malwarebytes.com, which is listed in the extension support, but I received an automatic reply saying, “Your email was sent to an unmonitored mailbox account.” and to open a ticket.

I used to enjoy this Add-on until recently. I am using Firefox, and lately I have been getting the error message that Malwarebytes Browser Guard is slowing down my browser and that I should consider removing it. Not good.

firefox says your slowing youtube.com down. Might want to fix that. I'm leaving it up in case i'm getting scammed. edit : It's still not working. I have contacted youtube about the issue as well now.

Causes my Firefox to run REALLY slow.

mb browser guard after latest update, does not keep saving the 3 tabs (ads, malware and scams) in the tab current website..uninstall or clear cache doesn't fix it. Except this, it doesn't recognize my premium subscription (device security is installed but it says upgrade to premium)

Browser performance (with many tabs) suffers terribly if both Malware and Scams are switched on in addition to Ads/Trackers. For Malware, and for Scams, global switches are terribly broken: after switching off globally at one tab, I find both features wrongly switched on globally at another tab. I'll gather debug logs and discuss in the forums.

Also, the release notes here at AMO are wildly inconsistent with the release notes at the Malwarebytes website.

ad-block turns on by itself even when switched off in global settings. very annoying

Hello, my name are Diego from Italy. I have windows 10 professional 64bit.

I receive reply of support of Malwarebytes Brower Guard, they write me i save in my email to tell for you for my segnalation, because your Mozilla Firefox must approvate the final version build are now 3.0.14 addons for mozilla name exacly Malwarebytes Browser Guard because are much later you have i look build 2.6.27 because you must approvate in your browser mozilla the final now version build are now 3.0.14.

The support of malwarebytes they write me this exacly this they want i tell you this to send you :

William (Support)

Hi Diego,
Thanks for contacting Malwarebytes Customer Support!

My name is William and I will help you with ticket #4734637.
The Firefox extension and the Chrome extension need to be approved by different companies.
Firefox ix is ​​sometimes very slow in approving new versions
Since Firefox is slow in approving new versions, there may be times when the versions between Firefox and Chrome will be different
Please be assured that as soon as Firefox approves the new version, it will be updated to the latest version
This is not a Malwarebytes issue, it is a Firefox issue.


my final Firefox version build are now 136.0.1 (64 bit) and Versione di Malwarebytes Browser Guard 2.6.27 are only update 11 Jun 2024.

So I really kindly ask you, so to approve their latest build version 3.0.14 that they released this March 2025 that has already been released for chrome and for Edge so you are the only one missing to approve their latest build of March 2025.

At this point I really kindly await your response to my request.
Best regards
Diego from Italy exacly in my region Sicily

Has started making websites slow to load, especially Outlook and a few others.

WTF is happening? 10GB of used memory for nothing , unistalling this useless thing rn

Slowed my firefox down so much that it caused a halt in loading 50 tabs.

I don't think this addon understands the difference between good websites and bad ones. It blocks 90% or more of the internet.

I liked it until I realised that the fact I couldn't access about 1/3 of web forms was this blocking everything from cookie consents to "next" buttons. Disabled it and realised I don't need to keep using Chrome as a work round.

Habe dieses AD-on auf Firefox auf dem PC installiert, bin in Urlaub und hatte vergessen, dass ich Malwarebytes installiert hatte. Plötzlich funktionierte vieles nicht mehr, was in Chrome funktionierte, WEB.de, DocMorris, Booking.com und viele mehr. Ich wollte nach vielen verschiedenen Versuchen schon Mozilla vom PC werfen und wieder auf Chrome umsteigen, als ich ich Malewarebytes wieder entfernt habe. Seit diesem Zeitpunkt läuft mit Firefox und den übrigen Apps alles super.

As adblockers go this thing is ridiculously overzealous. Blocks the purchase button from working if the website doesn't pass some kind of inscrutable vibe test.

Usually this is merely annoying but recently it made me miss reordering some prescription eyedrops for my dog.

Run away from here, ublock Origin on its own is fine! Run away!

caused multiple issues on many websites, even sites like Google Maps.

This plugins blocks my own website for phishing for years after using it for a few months, meanwhile my website is clean and I have even checked using other malware detectors and 3rd party scanning tools!!!

Annoying popup when copying things to clipboard. Constantly deletes items on my clipboard whenever it feels like it. Causes WordPress backend to crash. Youtube adblock complains that Mbam is messing with ad scripts. This extensions acts more like malware itself.

Causes browser to lag badly and crash.