April 26, 20233 yr Two days back Kaspersky addon for Firefox started using 40% of my CPU and lag and freeze my whole web browser. There are other people who complain about this bug in Firefox addons reviews. https://addons.mozilla.org/en-US/firefox/addon/kaspersky-protection-2021/reviews/?score=1
April 26, 20233 yr Hi @Zintoki Vitaj! ? 1. Version 21.3.10.391? 2. Reinstall addon (remove from browser and manually install)? 3. Reinstall KIS? 4. If still problems contact Tech Support
April 26, 20233 yr Author 21 minutes ago, nexon said: Hi @Zintoki Vitaj! ? 1. Version 21.3.10.391? 2. Reinstall addon (remove from browser and manually install)? 3. Reinstall KIS? 4. If still problems contact Tech Support Yes version 21.3.10.391 (j) on Windows 11 Build 22621 and Firefox 112.0.2 I reinstalled addon and KIS but nothing works.
April 27, 20233 yr Hi @Zintoki, please submit a ticket to technical support and pm me the incident number. Thank you.
April 27, 20233 yr I have the same problem. It is the latest version of the Kaspersky Protection Firefox Add-On (2.4.33.0) causing the issue. I've checked 2 PC's and both are affected. The previous version of the Add-On worked fine. I have reported the issue: ID INC000015261280
April 27, 20233 yr I am also having the same problem with the latest version of Firefox and Kaspersky extensions and agents. When enabled, the extension will consume up to 70% of CPU. Restarting Firefox resolves it for a short time, but within a few hours, the same problem happens.
April 28, 20233 yr hi. I have same problem here. i had to uninstall KIS firefox plugin. The cpu usage was insane high. Firefox used up to 90% cpu. plugin version 2.4.33.0 should i submit a ticket or wait for patch and update?
April 28, 20233 yr I've submitted a ticket also and uploaded some diags. Hopefully it will help resolve the issue.
May 1, 20233 yr 9 tabs opened in browser without any problem (kaspersky protection 2.4.33.0 with KPM extension)
May 2, 20233 yr Not going well with Kaspersky Support CPU problem started for me on Monday 24th, ie date of new FF extension - I have 8 windows with 100ish tabs total that I have to reload with "Restore Previous Session" when I repeatedly have to close and restart FF, running on i5-4690 3.5Ghz with FF Extension version 2.4.33.0. I reported this problem by chat on Monday May 1st and gave pretty clear description of how disabling and reenabling the Kaspersky FF extension reproducibly changes the CPU use by 35% approx for me. [In Windows TM with the extension enabled I see two serious CPU hogs from FF, one runs at about 25% and the other at 10%] I was told there is no known bug for this. When I said I'd seen incident reports on this thread I was told that "information was awaited". I was told to perform some diagnostics with first Exiting, then Pausing protection, then (if problem was stopped by Pausing) selectively disabling stuff. Oddly no warnings about risks of disabling Kaspersky while online, I did my tests with network disconnected. And also oddly no diagnostics of the FF extension requested in the script. As Pausing the protection did not stop the problem and the diagnostic script said to do no more tests but to advise I did that, by email later, and also added comments to restate the reproducible effect of disabling and reenabling the FF extension. Oddly I got a reply asking why I hadn't followed the rest of the script. So I have replied to say I followed the instructions. I've not heard back. If I close a few windows I get less CPU use, so perhaps this is a per-tab cpu use thing and thus not seen by people with a small number of tabs open? Anyway, it doesn't look like this is being worked on as a bug I suggest more people report it and add any useful information about number of open tabs etc. Looking in Windows TM I also notice that FF has an "undulating" memory use that varies by several GB over 10s of minutes, I think this was happening before the CPU problem started, but it does seem to go away when the extension is disabled. This also happens even when the network is not connected.
May 2, 20233 yr Author Well, give them one star on Firefox Extensions review and move to a different brand of AV. I have 270 days to end of my licence and then i will just move to something less buggy with proper support.
May 10, 20233 yr My issue has been escalated to the experts at Kaspersky as of 5/4, but I have not heard anything since.
May 11, 20233 yr Kaspersky Firefox Addon version 2.4.33.0 is using 40% of CPU. Revert to version 2.3.16.0 solve problem.
May 12, 20233 yr Likewise for me, downgrading to version 2.3.16.0 (and disabling automatic updates for the extension) has solved the problem.
May 12, 20233 yr Dear all, the issue has been fixed and a new version of the extension is being prepared for the release. We will post an update when it is out. We do apologize for the inconveniences caused.
May 12, 20233 yr Dear Igor, Very pleased to hear you have found a fix. You don't say whether KIS installs will be updated, please confirm. And please provide more clarity as to when it will actually be available. It is already midday in the UK, seven hours since your post above, but I see no update, will we get a version today? And are you saying that the FF extension will not update itself automatically? If so why not? Perhaps you could also explain why your various support people, well the ones I dealt with, took so little interest in believing there was a fault within the Kaspersky FF extension, despite the various threads and posts about it here and my informing support of the other posts and providing quite detailed information. No real interest was taken in the real crux of the problem involving the FF extension, despite clear evidence that simply disabling and reenabling it was the crux of the issue and that it wasn't some more general AV issue. It has taken two weeks to fix this since you were initially told about problems. Overall I'm pretty unimpressed with the service I have received, and am verge of moving to Sophos. Anything you can do to persuade me to remain with Kaspersky? Looking forward to your reply A long-time user.
May 12, 20233 yr 12 hours ago, Igor Kurzin said: The workaround is to install a newer version of the product (Kaspersky Standard/Kaspersky Plus). @Igor Kurzin But in some regions (inc mine) is still 21.3 version so install new version ehmm. From MR4 to MR13 (current) have not been released!! Why?
May 12, 20233 yr 52 minutes ago, nexon said: still 21.3 version so install new version ehmm I think that @Igor Kurzin is suggesting an upgrade to one of Kaspersky's new products, Kaspersky Standard or Kaspersky Plus. Kasperksy Internet Security has been discontinued: https://usa.kaspersky.com/internet-security The current version of Kaspersky Internet Security is 21.3.10.391, and it is still being maintained and supported by Kaspersky during the transition to the new product line.
May 12, 20233 yr @kwg ahh read again. In czech region is not available new range products ?♂️ Do not post USA link here i am not USA region thats what i wrote.
May 12, 20233 yr 7 minutes ago, nexon said: Do not post USA link here I am sorry, @nexon, for posting a link to Kaspersky's US site. I was simply trying to interpret Igor's post, which mentions the new product line, which is now the default on Kaspersky's US site. You are correct that Kaspersky's Czech site is still promoting the old product line: https://www.kaspersky.cz/home-security
May 12, 20233 yr @kwg no problem. I know what Igor wroted... just emphasized that there is still no new version available for this region... If someone asks when will be available no body knows when (Only this year or Q2) etc. It is maybe half year behind with releasing new products for some European and also asian regions i think. Should be released in same time globaly (few days weeks is acceptable delay between regions) but half year?
May 14, 20233 yr I am having the same problem. Not sure exactly what precipitated it. Kaspersky or Firefox. It was always a bit slow but after the latest Firefox update it is absolutely TERRIBLE. Disabling Kaspersky plugin and problem goes away... SO MUCH BETTER. This is absolutely ridiculous. What is interesting is that it gets worse with time. I shut down Firefox to get it to go away. Certain content works better than others but after 3-5 minutes of being on, the lags and freezes are constant, even when Firefox is just running in the background. Honestly, I don't trust what it is doing and am probably going to change my Antivirus software after years of trusting Kaspersky. Edited May 14, 20233 yr by Matthew
Two days back Kaspersky addon for Firefox started using 40% of my CPU and lag and freeze my whole web browser. There are other people who complain about this bug in Firefox addons reviews.
https://addons.mozilla.org/en-US/firefox/addon/kaspersky-protection-2021/reviews/?score=1