Firefox Support Forum

I am using the latest version of Firefox with Mojave on a Mac.

Lately I have experienced slowness despite the fact that I didn't add any software and I have Norton checking for viruses. Recently I got a message "Your system has run out of application memory" when I had 5 tabs open in Firefox. I checked Activity Monitor and it showed Firefox using 1.16 GB. 7 other apps were open, the next one with the highest memory usage was Mail (465 MB). Activity Monitor showed 30 instances of FirefoxCP Isolated Web Content entries.

I attached a screen capture showing what Firefox was using in one of these instances. Is this "normal" with 5 tabs open?

I closed the open tabs and quit Firefox. Memory usage by Firefox went down, but after a short time the problem happened again.

A search on the internet showed lots of similar complaints about FirefoxCP Isolated Web Content. Is this a known bug? Any way to avoid this problem?

Thanks.

I installed mozilla today and I looked in to my settings and found this message "Your browser is being managed by your organization."

I am not part of any organization since this is my home pc.

I checked the forums but i couldn't solve this.

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Mozilla\Firefox and HKEY_CURRENT_USER\SOFTWARE\Policies\Mozilla\Firefox doesn't exist for me and i don't use avast.

On about:policies it shows "Certificates-ImportEnterpriseRoots-true"

What is this ImportEnterpriseRoots thing?

I'm using a laptop with windows 11.

Can anyone help?

i just last night switched to Firefox and i am loving it! the only issue i have is that YouTube does not seem to be able to go over 480p no other website has this issue (for ex twitch) and if this could be fixed i would never go back to chrome

Hi,

When using the right click menu on a PDF item in the Download Library (Ctrl+J) option Open In XYZ PDF viewer opens the pdf in chrome!!! option [selecting] Always Open In XYZ PDF viewer opens the file in chrome!!! option [deselecting] Always Open In XYZ PDF viewer opens the file in FF!!!

Double clicking on a PDF item in the Download Library (Ctrl+J) also opens the file in chrome!!!

This is totally wrong, please fix it asap. Thx

Greetings!

I would like to be able to open selected links via the search tool with CTRL + Enter, like it is possible on most browsers. Basically, I do CTRL + F, select a text which brings me to a link I was looking for, and do instantly CTRL + Enter to open this link. Currently, this shortcut only toggles the ability to see all matched texts and doesn't open the link.

Do you know if it's possible? Thank you!

I had two Firefox windows open. One had 100+ tabs open, the other had around 5 open. Like a klutz I accidentally closed the window with the 100+ tabs open instead of the other window. Now when Firefox restarts it opens the version with the 5 tabs.  :-( I read about lost tabs in Firefox. I have found a file with the 100+ tabs in it. It is called: upgrade.jsonlz4-20221007134813. But what do I do next to restore Firefox to restart with the 100+ tabs version? Thanks.

MP4 videos fail to play with the following error messages:

1. No video with supported format and MIME type found.
2. Video can't be played because the file is corrupt.
3. NS_ERROR_DOM_MEDIA_FATAL_ERR (0x806e0005)
4. Error no decoder found for audio/mp4a-latm

example video #1 on https://tekeye.uk/html/html5-video-test-page

other notes:

• issue began a 1-2 weeks ago
• issue does not exist on chrome browser
• MP4 videos can be downloaded and played successfully in applications other than firefox
• other video formats play successfully in firefox
• issue persists in troubleshoot mode
• issue persists with hardware acceleration on/off
• issue persists with tracking protection on/off
• media.mp4.enabled is set to true

Every time I close out of Firefox and then later, reopen Firefox, it restores my previous session.

This is despite my settings being like so:

https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2022-10-10-07-31-50-59f657.png

And my "about: config" set like so:

https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2022-10-10-07-34-04-637557.png

What can be done so that, after closing Firefox, it does *NOT* restore my old session when I decide to open Firefox again?

Although I allowed google ads (shown in "Not Blocking Tracking Content" list), they are still blocked. Is there a way to fix this? This problem appears on two sites (https://www.agame.com/game/tropical-merge, https://www.games.gr/paixnidia/the-mergest-kingdom) only. Other sites work as they supposed to. ABP is disabled. If I turn Enhanced Protection off, I can see google ads, but I lose any progress I have in these games. Any help would be appreciated.

What is with Firefox lately. Endless problems with screen sizing, light dark mode. But what is really pi**ing me off is the inability to connect to certain web pages. No I don't have a any spyware or viruses (I have scanned with 3 different programs) and I have no problems with connecting to the pages with Chrome or Edge. I'm getting the error messages

Did Not Connect: Potential Security Issue Firefox detected a potential security threat and did not continue to www.amazon.ca because this website requires a secure connection.

Did Not Connect: Potential Security Issue Firefox detected a potential security threat and did not continue to www.ebay.ca. If you visit this site, attackers could try to steal information like your passwords, emails, or credit card details. Firefox detected a potential security threat and did not continue to www.google.com because this website requires a secure connection.

Did Not Connect: Potential Security Issue Firefox detected a potential security threat and did not continue to www.google.com has a security policy called HTTP Strict Transport Security (HSTS), which means that Firefox can only connect to it securely. You can’t add an exception to visit this site.Error code: SEC_ERROR_UNKNOWN_ISSUER

And I get the same warning with Amazon, eBay, my email client Shaw Mail, Google Search, and several other pages that require a login. Is there anything I can do to fix this as I'm really starting to rethink my preferred web page browser?

When my Norton VPN is turned on, I get the following error message when I try to access Staples.com. This does not happen in Edge or Chrome.

You don't have permission to access "http://www.staples.com/" on this server.

Reference #18.44697c68.1665668757.1bd3f14e

Hello! I want to register a security key (Fingerprint) for a website called Roblox, but it doesn't work. It says: "www.roblox.com wants to register an account with one of your security keys. You can connect and authorize one now, or cancel."

Can you help me please? Thank you very much! :)

Hubert Delaporte

mackiewizard mackiewizard Making moves

‎10-08-2022 07:40 AM

I have been having an issue for a week or more and no updates from the browser seems to fix that. The error reads: Bad Request Your browser sent a request that this server could not understand. Size of a request header field exceeds server limit. This is occuring with a request to RBC banking. The same appears to be true but witrh different language for a request with Desjardins Insurance portal.The second link printed in red is the result after I cleared all cookies from Desjardins site. I can access many other pages within the two sites. RBC I am logged in (In black). Desjardins I am not yet as a user when these errors come up

Hello,

In a previous version of firefox, I could right click within a text area for example, which would allow me to check my spelling. Since upgrading (which was actually from a higher Beta version, to the latest current stable - a new profile was created), I had not had this option. As you can appreciate, it's a very handy tool to have, so I have been attempting to get this function back today.

Within my language section, initially there was only 'English [GB]', which was as it should be. I had 'check spelling as I type' checked also. This did not automatically check as I typed. It did not check at all, not could i right-click to check spelling.

I have since added 'English [US]' to see if this would then allow me to remove and reinstate 'English [GB]', but it did not. I then added a third option which was 'English [CA]'. The config allows me to remove only 'English [CA]', which when pressed removes it from the list, but by pressing the 'set alternatives' button again, you can see that it has returned.

I have since managed to get firefox to check spelling in English [GB] by adding 'British English Dictionary (GB)' (https://addons.mozilla.org/en-GB/firefox/addon/british-english-dictionary-gb/), but now I am also stuck with English US and English CA. EN-US does not allow it to be removed whatsoever, even though it was only there after I manually added it and EN-CA allows me to remove, but returns. No option to apply and restart firefox appears (I've seen this appear in another user youtube video on the subject). Closing and opening makes no difference.

How can I removed English US and English CA please?

6 images attached, in sequence order. Between images 3 and 5 you can see CA being removed and returning (and also no option to remove US). The last image is what I am now trying to get rid of.

i have a login to Harris county /toll Road Authority. A few weeks ago, it quit loading. When I click the bookmark, the tab shows motion, but after that, only a blank screen. I have tried the same web site on MS Edge, and it loads without a problem. Tried settings change to no proxy, adding the login to exceptions - no change, it still loads a blank screen. What is going on?

I have two computers with same version of windows and Firefox. One shows Vulnerable passwords alerts not showing, the other doesn't. Show alerts about passwords for breached websites is selected on both

Hi, Is there any way I can view contents of a previously closed webpage? I got an estimate for a health procedure, but did not take a screenshot. Now when I go back via link (provided to me in email) to view the estimate, it's no longer there. Thank you!