Works well for blocking spam and I've gotten a few warnings about certain sites. Some first time going and some I know to be legitimate, but that's how security goes. Still lets me go if I acknowledge the warning of course. The main issue is that some, though few, websites have loading issues. Mine specifically is my microsoft email through outlook/live.com When I go there I can't interact with much for a good 20 to 30 seconds. I've tried disabling the ad, spam and malware protections specifically for outlook/live.com email website and also disabling global protection of those features, but it still does the same. I specifically have to disable the "All protections" setting. So it seems like its still actively doing something even when i globally disable the 3 protections for all sites and only stops if I tick the option to disable all protections. I don't really care about that specifically, but just noting that seems to be why outlook/live email performance in the browser goes back to normally after disabling it. While I like the ad block feature enormously since it actually works, I don't want to disable the whole thing everytime i need to check my email so I'll just leave it off for now and circle back to it in a month or so to see if this issue is resolved with some kind of update. Been putting up with it for well over a year so its not a new thing. I just didn't think to leave a review about it until now. I would submit a report/ticket to malwares help center directly but it requires making an account and I just don't want yet another account. Hopefully they see this when checking reviews.

Edit: Actually it effects my google emails as well, just less so since the delay is one or two seconds I didn't notice as much though now that its instant its very noticable. The outlook one is basically instant when its disabled too just not as fast as google's email, but compared to the almost 30 second load time prior the difference is wild.

Edit2: March 30, 2025
I've updated to the 3.0.14 version and the huge delay in outlook email is gone! Bumping review to 5 stars since this removes the main issue I had with it.

Edit3: April 10, 2025
Updated to version 3.0.17 and a several seconds delay is happening now. Its a little better when I tell it to disable all protections for everything, but if I turn it off for only outlook then there is no difference so its still doing something again. If I disable the extention altogether then its based to instant speeds. Not sure what happened between the updates but its unfortunate. I'll try to install the 3.0.14 version and try to keep it from auto updating. Its also possible this is a firefox thing since it updates as well. So I'm not gonna just blame malwarebytes outright on this one.

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

Lacks real support, instructions for an ALLOW LIST tell me where to look, but it's not there.

Great experience as always. But as it's app version, it eats to much memory. Wish some day your creation won't even bother a low-end devices

It's a good extension for blocking trackers and security reasons, but it eats up too many resources and makes websites slower to load.

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

🌕SUKHEN GAUTAM FAMILY SHAEE PUSHTAINI SARKAAR PIDIYAAN PARIVAAR.

For some reason malwarebytes really abuses my ryzen 3600. It makes the CPU temperature go up to 65 degrees Celsius on some websites.

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

Perfeita para segurança total junto com antivírus. Superou expectativas em minhas máquinas não alterou nada em desempenho do sistema e de softwares.

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.