Mate, no other add-on stuffs up as much as this one. Today 50 of me tabs got blocked; I could only remember about ten off the top of me head – the rest are gone for good. That’s why I’m chuckin’ it today; the risk’s way too high. A couple of times a year somethin’ goes pear-shaped, so I gotta switch the add-on off. I’ve had a bloody gutful now!

yep nice .. every single website was blocked on my tab. I googled to look how to unblock everything with one click and did everything, even checked for database updates and nothing worked ... everything is still blocked .. had to manually unblock everything .. thank you very much for this work. Something that blocks everything out of the blue is the last thing someone wants.

Was great until it decided to block every single one of my tabs. What's wrong with reddit and google searches? And it didn't just block them, 80% of them couldn't be rewound so I lost most of my groups. Seriously, quality check your updates for crying out loud.

The latest version of 3.3.6 is a mess. It blocked every single tab I had, even the pinned ones. The version was last updated Sept 30, 2026 (today is Oct 1st). It was working all day and then out of the blue it blocked every single tab. What a mess.

The latest update blocks the Malwarebytes website itself as unsafe. When someone shows you who they are, believe them.

Roll back the update. I don't know what idiot authorized this latest update but it's completely broken web browsing. Github wont load the landing page properly and it's just a bunch of text on the left side of the screen and several websites I frequent are being blocked now as "scam" sites, when they arent. In fact I can't get "scammed" anyways because I have an ad-blocker. Roll it back, undo this disaster.

Edit: Disabling the plugin until this is fixed.

Literally blocked my connection to Youtube, Twitch and other obvious not-malware websites just because.

Absolutely trash. Addon decided everything was malicious and crashed the browser causing every tab and tab group to be lost.
Thanks. Maybe QA your updates next time

Stopped working today blocking every page becoming unusable

Out of nowhere started blocking literally every page I tried to open on the basis of "risky patterns". Now completely unuseable.

latest updates re-enables optional options by itself, seems to be gathering data. Trash.

When i disable this extension, my videos on an anime site starts working again, this never had an issue on chrome but it stop after a few seconds on firefox

Since it runs in the background, I really don't know what it's doing. But on more than one occasion it has blocked potential malware. It has popped up a notification on the screen advising not to go to that link. It does exactly what I want it to do.

I know that the company Malwarebytes has been around for quite some time and that the company name is a play on words. What I am going to say that the product(s) this company produces,as a whole, "BITES!!" I am running Windows 10-Pro 64-bit. From the website filehippo.com. I downloaded the trial of their software. Well, that was quickly uninstalled when it was detecting regular software as PUPs and putting them into quarantine. Not only that it was causing my PC to become unstable. After doing a total uninstall and removing any leftovers in the Registry, my PC returned to normal This is when I found their browser extension. After the extension started causing Firefox to become as steady as a one-legged man walking a tightrope, I understood why there is a warning at the top of the download page that reads as follows. "This add-on is not actively monitored for security by Mozilla." I was getting errors that I NEVER received prior to installing the extension. This extension stopped me from accessing my GMAIL, eBay, Amazon, and Walmart accounts on more than one occasion. While surfing those sites, I will get the pop-up window stating that the website could be harmful. Webpages would not fully load, or if they did load, it was only the text and not the interactive HTML. Lastly, it would make the browser act like it was running at dial-up speeds. Well, guess what. Just like with my installing the software for my PC, uninstalling the extension from my Firefox browser, it returned it to normal. There are other products out there that do the same thing, if not better and will not give you migraines while using them.

Ever since I installed this extension, Firefox has become horribly slow. Basically, it slows down the performance of other extensions (especially email management ones). As soon as I uninstalled it, Firefox went back to normal.

It blocks Google News links due to "Tracking Attempt". It does the same with Google Images too.

I posted this previously 25 days ago, and a Dev said to go to the Help link to report the problem. However there was nowhere on the Help Site to submit a new query, just talk to a live agent, and I don't have time to do that, I am at work.

Anyway, an example of a blocked link was

news.google.com/topics/CAAqLAgKIiZDQkFTRmdvTkwyY3ZNVEYyZVhkc2JXTjVNaElGWlc0dFIwSW9BQVAB?hl=en-GB&gl=GB&ceid=GB%3Aen

I really like malwarebytes I've been using it for years!

One quick question, I'm working on a project that requires geojson data and was hoping to download the files from this repository which I believe to be an official repository from Natural Earth Data which hosts a range of datasets relating to geography and maps.

Why is this repository or user flagged? (I can't post URL's so will post the user and project name from Github)

Site: github
User: nvkelso
Repo: natural-earth-vector
File: Any geojson file

Is there anywhere we can report potential false positives?

This is a pretty good extension. However, I have had issues where firefox loses all network connection if loading pages with a lot of media, or scrubbing youtube videos fast. I now, after at least a year tried disabling the malwarebytes extension and that fixed the issue i was having.

Hopefully this is something you can solve in future updates.

Broken cookie banners on multiple sites.

I wanted to report that this extension causes cookie banners to malfunction on various websites. The banners disappear after just a few seconds, without giving users enough time to manage their consent. I am experiencing this major issue also on my own WordPress site, which uses the Cookie Complianz plugin.

Since these banners are configured to automatically reject cookies when closed (keeping them disabled until explicit user consent), certain website functionalities break entirely. The only workaround is to disable the extension's ad/tracker protection, which the vast majority of users obviously won't do.

UPDATE - Reply to your answer:

Thanks for the reply, but there is a misunderstanding here.

I am using Complianz, not CookieYes (the link provided in your response belongs to a different plugin).

Complianz is strictly configured for prior consent (opt-in). This means that if Malwarebytes blocks cookieblocker.min.css, it doesn't cause trackers to load; instead, it completely breaks the banner layout.

The real issue is that the user is physically prevented from interacting with the banner because it vanishes immediately. If a user actually wants to consent to load a YouTube video, a Google Map, or a social widget, they simply cannot do it because the interface is broken by the extension.

This is a False Positive purely based on the filename string. Please consider forwarding this to the development team so they can whitelist or fix this specific filter. Thank you.