I-Firefox Isithangami Sokwesekwa

Until several weeks ago, new windows created through Javascript with window.open() worked. We could pass the new size, and other features, e.g. menubar, toolbar, etc. and they would show up. As of v.76.0 this is no longer true. The parameters are ignored. If we use no parameters, the menubar, etc. do show, but we can't control any new window features. We have not changed our programs at all, and window.open() parameters still work correctly in Chrome, Brave, Edge, etc. How do we get Firefox to recognize the window.open() parameters (again)?

I keep a few windows open normally - each window has a number of tabs.

Every time I close firefox, whether it's to restart my mac or just to quit and re-open the application, every window opens up but I cannot see it. When I click the firefox icon in my dock, it shows the list of windows, but when I select one, nothing comes up on my screen.

The workaround I have found is to select the window and then go to the menubar and select VIEW > Enter Full Screen. This then maximizes the previously invisible window. I can then minimize the window and adjust the size as I prefer.

Why is this happening? This has been going on for about a year, through various Mac OS updates as well as Firefox updates.

Firefox needs a limit on memory usage. I was developing a tiny web page on Linux (PopOS) and accidentally created an endless loop in Javascript that ate memory (by growing an array). My entire OS became inoperable and had to be hard-rebooted. I was surprised this could happen due to Javascript (a sandboxed browser language), running in a web page (a sandboxed app) running in a Firefox browser that is supposed to protect users from the world wild web. One errant line of legal Javascript in HTML should not equate to a denial-of-service attack.

A sensible approach would be similar to the nice warning given when a script takes too much CPU, offering the user the choice to continue or stop the script when a tab exceeds some reasonable size: a fixed MB size, or say 10% of real RAM memory.

Ideally there should also be some hard limit calculated by Firefox according to the machine's available memory and Firefox's reasonable percentage of it. For example, maybe limit Firefox (all tabs combined) to 50% or maybe 75% of real memory, so that the O/S has a reasonable chance to remain operational so that a bad tab can be closed. Otherwise, Firefox could cause the O/S to lock up, resulting in data loss if there are tabs or other apps outside of Firefox that have unsaved changes.

Thanks for your consideration!

Hi everyone,

I have the problem in the Subject line. FF sucks about 500 MB to be run, on top of which it takes 500 MB per tab, and that makes it impossible to run a research on my 8 GB Mac. Yesterday I was looking for a lamp and had no more than 7 tabs open, 3 of which were largely text, 2 were online shops, and 1-2 were websites with pictures. No Facebook or social media, no YouTube. FF froze, made the whole Mac freeze (well, Mac is garbage nowadays but let's leave that out of this topic), and I had to wait MINUTES before I could close it, because the computer was nonreactive.

When I check online, I see people being like "why can't it manage more than 50 tabs?". 50?!?! My computer dies with a maximum of 10 when it's only text websites!

So, I guess there's something wrong with this.

- I don't have many extensions (SimilarWeb, VPN, and Flash Player), I always use incognito so I can't use the plugin that allows me to use several accounts at the same time, so I can't see what's messing with my Mac. - The Activity Monitor (pretty much Task Manager on Windows) shows "FirefoxCP Isolated Web Content" for each tab, could that have anything to do with my problem? - CPU usage is very low, some 0.5 to 10% max during heavy use. - I seem to remember I used to have dozens of tabs open in the past, although I can't be sure. Is this a recent problem?

I really hope there's a way to solve this, because now I always fear that opening FF while on a Zoom meeting might freeze the whole thing.

Thanks to anyone who might want to shed some light on this big problem.

Screenshots: RAM and CPU usage with 2 tabs open. Two, taking more than 1 GB of RAM and about 250 threads in total? While using 0.2% of the CPU? I'm lost

I recently upgraded graphics cards from an Nvidia GTX 1080 to an AMD 6900XT. Since then I noticed video stuttering on YouTube while playing 4k videos, especially noticeable at 4k/60FPS (example video ). Prior to the upgrade, I was not experiencing issues.

I monitored task manager as the video was playing to see CPU usage, which was sitting at 25% (4 core 8 thread CPU). GPU usage was fluctuating from 1-3%.

I tried resetting all the changed configuration options in about:config, removing all add-ons, "Refreshing" Firefox, and ultimately uninstalling and reinstalling. Nothing has worked so far except for "Troubleshooting mode" in about:support. In that mode, I experience no stuttering and GPU usage rises to 25-35% with the video playing, even before I reinstalled.

This most likely isn't a networking issue as the "Stats for nerds" option on the YouTube video shows I have 10-20s of buffer while the video is still stuttering.

I would like to find out what's different about Troubleshooting Mode that is not giving me the same problem while in "Normal Mode". Any advice?

Firefox RAM usage on M1 Mac has dramatically increased. Unfortunately, b/c the memory usage is in firefox parent process, I can't simply terminate a process corresponding to a "tab", meaning I have no choice but to restart Firefox (closing & reopening all tabs) every hour or so of usage.

This is a new issue from a long-time firefox user (on multiple operating systems). It happened after I upgraded the Mac to "Monterey", which may or may not be coincidence.

Each and every time I try to reply to an email received in my Optimum Online account, when sending there is a pop-up (drop down) saying "Webtop error" and nothing else. There is no record of this error in the Mozilla database. I have found little if anything elsewhere. Email can only be replied to by using a different browser, such as Opera. Windows 10 x64. All latest software updates installed.

Upon further search, I find that "webtop error" may be related to Unified Compliance Framework, which sounds Draconian. Further research is proceeding.

Kurt Faasse

Hello! I’m using a Mac and I just recently changed the main user’s name in the laptop, and now some images won’t ever load. For example, the profile pictures won’t load in StackOverflow and the image of my university in Google Drive won’t load. Actually, I’m not really sure anymore if it has anything to do with changing the username but I only started noticing it after that time. I also tried clearing the cache and resetting Firefox and even tried reinstalling it but the images still won’t load. Any help would be great. Thanks!

Firefox worked perfectly, but since a few days I can't download anything. I'm using Mozilla Firefox snap for Ubuntu 22.04, version 110.0.1 (64 bits) canonical-002 - 1.0 With Chrome everything works perfectly so I assume it's a problem from Firefox.

When I open a PDF, a MP3 or any file, the "save" option doesn't display anything. Usually it opened a dialog where I could choose the folder where I wanted to download the file, but now I have nothing.

I have only 4 extensions: - adblocker ultimate - duckduckgo privacy essentials - vuejs dev tools - zotero connector

I always had them and I never encountered any problem.

I've been using my banking site for many years on my desktop computer. Today the site comes up but when I try to log in I get a "404" error message. I tried logging in with Edge and there was no problem. I have deleted all my banking cookies on Mozilla and the result is the same. This is a major problem and I would appreciate any suggestions.

Hi, so yesterday, I updated to the latest version of FireFox (version 105.0). Nothing seemed to be out of the ordinary until I decided to watch a few YouTube videos. The best way I can describe this problem is that every time I decide to scroll down to see the description or read a few comments, the entire screen on my laptop goes black regardless if it's on default view or full screen.

Even though that does sound like a crash, the audio still plays, and if I power the computer to sleep mode and log back in, the window of the video automatically scrolls up and everything is back to the way it was (but I did had to restart the laptop once because it also visually broke my mouse pointer). The only way I can get around this problem is to pause whatever video I watch and then scroll down, and no black screen occurs.

I don't know if I'm the only one who has this problem, but I've never had this issue happen in past versions of FireFox. If there is another way to fix this problem, I'll be glad to take anyone's possible suggestions/solutions.

Running Firefox 98.0.2 (64-bit) Mac OS Monterey 12.2.1 (21D62)

Many websites are not loading at all or taking many minutes to load (bankofamerica.com, maps.google.com, etc.) Maps.google.com does not even load on Firefox.

Usually indicates 'waiting for fonts.google.' in the lower left hand corner, but site never loads. This is happening more frequently, on more and more websites.

Google Chrome has 0 issues loading the same websites. Firefox specific issue independent of ISP. Tried restarting, updating, etc. No luck.

Dear Mozilla Community members,

For a while now I get sort of an error message some time after Windows start (every time): "XULRunner Could not determine any profile running in backgroundtask mode!"

I managed to find out that XULRunner is connected to Mozilla but I haven't found any info about this particular message so far, therefore, I would appreciate your help solving this issue.

Thank you in advance.

Kind regards, Ewelina

on my Win10 64b system the FF browser keeps the tabs visible after the last 99.0.1 update. i didn't make any changes to the browser after that update that i can recall. thx!

Firefox tabs crash repeatedly for a particular email website that I am using. Specifically, the tab crashes when I click on an link to open an email and see the email contents. The tab will not crash every single time, just occasionally (i.e. sometimes I am able to read an email without the tab crashing, other times not). I do not think that the timing of the crashing has anything to do with the email contents (e.g. length, format). I also do not think that the tab crashing issue is happening for any other websites. The crashing started recently, sometime late December.

I installed the latest version of Firefox, and I cleared the web cache, but nothing has changed.

Any suggestions?

I get so choppy scrolling that my eyes hurt after few minutes. Doesn't happen on Chrome or Edge. It is most noticable on YouTube. It feels like it's running at 15fps

I'm having the exact same problem that

https://support.mozilla.org/en-US/questions/1157490

firefox itself opens and loads within seconds perfectly fine,[...] But when I try to go to any website, it takes ages to load and function normally. [...]

Once it has loaded the website(s) it functions completely normally

As the solution in that thread was a full format I'm reopening this to find a more precise solution.

I tried everything on that thread without success. Deactivated every plug-in and the problem persist. Running in safe-mode corrects the problem.

I attach an image of the profiler (I can send the full profile if needed)

Hi all

I'm a happy user of FF but have started to see issues with JavaScript (error message: You need to enable JavaScript to run this app.). I do the about:config correction and it sometimes works, but now the error is spreading to involve other pages - a page worked yesterday doesn't work today.

Is it just me?

//Allan, Sweden

I need to automate the deployment of Firefox along with the extensions. I put three extensions (uBlock, Translate Web Pages, and Auto Tab Discard) in the /usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/. All extensions load normally, except Auto Tab Discard. When running firefox with the -jsconsole option, I see what the screenshot shows (the message "Invalid addon ID"). But the installation to user profile is successful. I add the extension ID to manifest.json, and get the following output in the console: addons.xpi-utils WARN addMetadata: Add-on {c2c003ee-bd69-42a2-b0e9-6f34222cb046} is invalid: Error: File /usr/share/mozilla/extensions/{ec8030f7-c20a-464f-9b0e-13a3a9e97384}/{c2c003ee-bd69-42a2-b0e9-6f34222cb046} does not contain a valid manifest(resource://gre/modules/addons/XPIInstall.jsm:669:11) What can go wrong?

System: Debian 11 (bullseye) Firefox version: 91.4.1esr (amd64)

If you need any other information, please ask, I will write it down.

As the title says, I cannot get MP4 files to play in Firefox, which renders several websites unusable. These sites work in Edge just fine, but I cannot get them to work in my preferred browser. Everything is up to date, and I have all the codecs I could ever need installed, as well as the Windows N Media Feature Pack. The browser has been tested several times in troubleshooting mode, and I've even gone as far as running Windows in safe mode with networking to try to isolate the issue. I cannot get it to work at all. This is the 2nd device I've had this issue on, and it's driving me up a wall.

Any help or advice would be greatly appreciated.

Firefox 103.0 (64-bit) Windows 10 Pro N 21H2 19044.1865