Firefox Community Forum

I'm reposting a question already opened here because a moderator suggested to do so. Actually I though I was posting to the international forum from the URL...

I was trying to access a local HTTPS website of an embedded device (a Siemens S7-1500 PLC) that is using a self-signed certificate, but was unable to go on (attached image #1, in Italian language) due to the the SEC_ERROR_REUSED_ISSUER_AND_SERIAL error. I've browsed a similar PLC webserver in the past, so the fact that the device exposes a similar certificate serial number is not so strange for me, considering also it's self-signed.

The problem is that I cannot follow the instructions of the Mozilla knowledgebase here because I'm not able to identify the correct certificate of the website!

In the attached image #2 you can see that the connection is detected as not encrypted, I suppose because only the form part of the HTML that is posting the data using HTTPS while the rest is using HTTP, but I'm not sure. If I click on the padlock icon (attached image #3) the info about the current certificate is not displayed.

Then I went into Tools > Options and searched for "certificates"; as you can see in the attached images #4 and #5, neither in the Servers tab nor in the Authorities tab I can find any item that is related to 192.168.10.2 (the webserver IP address) or Siemens (the embedded device manufacturer). But unfortunately the error persist! Initially there was a 192.168.10.2:443 line in the Servers tab and I removed it and restarted Firefox, but it didn't solve, so at the moment the situation is the one depicted by the attachments.

I had to use Microsoft Edge to access the website, but I would like to solve this issue and use Firefox instead. Is there anything else I can do to bypass the error? Why doesn't the error page provide a way to correctly identify the wrong certificate using its fingerprint and/or name? Or, maybe, is there a way to disable this check for local IP addresses or for items in a whitelist?

Thanks for your help.

Home Internet speed via cable 500 Mbps. When checking the Internet speed through the Firefox browser (version 133.0.3), incoming and outgoing about 250 Mbps. That is, the browser cuts the speed twice. When checking the speed through Google Chrome (version 145.0.7632.160), the Internet speed is about the declared 500 Mbps. Please help solve the problem with Internet speed through the Firefox browser.

Hi,

I’m experiencing the following issue:

When I open Password Manager (about:logins), the page is completely blank.

This problem started about three months ago, after I updated Firefox to a newer version.

Currently, on the about:logins page, I can export all my accounts and passwords as a CSV file (so the data clearly exists), but nothing is displayed on the page itself.

I also tried importing the same CSV file (exported from about:logins) back into Firefox. After importing, all accounts and passwords appear in the left panel. However, when I click on any item, the right panel is still blank. If I close the page and open about:logins again, the items still do not load.

My current Firefox version is 147.0.

How can I solve this problem?

Thanks!

I encountered an issue where pasting multiple images causes the upload to fail. It seems like it cannot handle more than 2 pictures at once. Could you please help me fix this?

Ok, I screwed up.

I was trying to solve a problem I've been having with regular releases of Firefox and it occurred to me try the ESR release so I downloaded and installed it. The good news is that it solved my problem, the bad news is that I just barrelled into it without thinking, assuming that my logins and bookmarks would just transfer over like with regular releases. They did not. It turns out I should have made a backup of those things first and I can't open the old regular release of Firefox to properly back-up those things now. Oops.

I've been reading lots of forum posts here and elsewhere trying to get those files into ESR and I haven't been successful. From the profile manager I've located the profile that still contains that info and I've tried:

Copying and pasting the "logins.json" and "key4.db" files from the "default-release" profile into the ESR profile which didn't work.

From "about:profiles" I also tried to "launch profile in a new browser" of the default-release profile so I can open that profile and properly back-up bookmarks and logins but I get a prompt to create a new profile which I tried several times and only resulted in several profiles of the ESR release.

Then it occurred to me that If I could just delete all instances of ESR and open the old default-profile then I could back-up the logins and bookmarks, THEN download and install ESR again and import those files but before diving into that I need to make sure that won't loose my original default-release profile info.

So experts, does that sound reasonable? Delete all instances of ESR so I can open the regular Firefox? What's the best way of going about that?

Thank you.

My browser is not working as it should. Several sites do not work anymore and the browser keeps crashing. I'd like to refresh the browser, but the button is missing. I tried going to troubleshooting mode, but the button is not there either.

Not sure if uninstalling would do the same thing? Just not sure what is the best way to refresh. Thanks for any help!

The email address box does not accept the email address and comes up with an error message. The only way to send an email is to use a different browser ie Google. Emails are still received as normal on Firefox / BT mail

How do I stop this page from coming up several times a day. I have already set FireFox as my default browser, several times, but to no avail. I've careful followed your instructions. I dislike MS and have used FF for years. If this doesn't stop, I'll search for another browser that hopefully behave. I have set it on 4 computers, 2 Win 10, 2 Win 11.

By the way, the computers show FireFox twice, but only one actual installation.

Please do better!

Hello

We use ManageEngine's ServiceDesk plus and all has been fine until Firefox 148 update was installed.

The body of a request where we type details of a case or insert images now will not display anything. The data fields are fine, it is just the description box which appears to be iframe. Other browsers still work, but we prefer FF.

Thanks in advance - Terry

I only use Firefox to play two browser games that both use the 1-5 keys as an alternative to clicking the mouse. Accidentally clicking Ctrl and switching tabs out of nowhere is becoming a really annoying problem, but I don't see any way to just turn off shortcuts and hotkeys like other the other browsers I use. Is there any way to do this? Even a specific extension that makes the Crtl button do nothing would help, the one I was recommended won't download due to a "corruption".

You guys keep hijacking my browser and stopping all my work on a near weekly basis. Shutting down my ability to work on projects and stopping my browser from functioning in the middle of use. I can't even pay bills without you guys interrupting my browser with your bullcrap.

This is unacceptable. I've gone through great lengths trying to stop you from hijacking my browser. I installed a policy generator and followed the instructions to put a policy in. I uninstalled Firefox's background updater tool. I disabled automatic updates in the settings to the best of my ability.

I've gone through everything I can think of trying to stop your forced updates. Its unethical what Mozilla is doing to its users. I even tried to lock policies with admin only authorizations but firefox couldn't read the file anymore when I did that. I did confirm today that the policy file was still working, when Firefox ignored it and shut down my browser till I restarted it. I confirmed that Firefox is blatently ignoring policies.

I just checked and Background Maintnence was installed again when I didn't want it. You're now installing software against my will too? What the hell is going on.

Let's say I have a group of 5 tabs. If I open a new tab from any of those tabs, I want that new tab to end up at the right of the group but not part of it.

Can I do that?

When I sign in to Firefox it puts a message up saying Microsoft is no longer supporting Windows 10 and telling me to backup my info to get ready for Windows 11. I'm not planning to get Windows 11 as my PC won't support it. Should I ignore this message?

I use Firefox as my browser and have used Yahoo as my home page and browser for decades. Starting a few days ago, every time I type in the Yahoo search bar I get a Google search page result. I opened Bing and tried to search on their page and got the same result - Google. This is driving me crazy. I want my old Yahoo search back. I am at a loss as to how to fix this. I have looked at the Firefox settings and, of course, Yahoo is no longer listed. A shame. I don't know what to do at this point. Maybe the answer is to get rid of Firefox, but it has worked well for me for a long time. Any help will be appreciated. Thanks.

Well being an OAP I needed new laptop. Always used Firefox browser but finding it difficult to get restarted. Had to opt out of window s to even download. Apparently I can transmit(?) my existing passwords etc from one laptop to another is this correct? Only basic computer knowledge but trying hard !! Karen x

Every time I manually update firefox, it reinstalls the automatic update malware "Mozilla Maintenance Service". I can't stop this malware from being installed with my browser every time I update Firefox. I call it malware because its not wanted, and it behaves like malware by secretly downloading content without my consent and then shutting down my browser when it finishes by blocking access to all new tabs.

I've tried adding policies to stop auto updates, but Mozilla Maintenance Service ignores all policies. I'm going to see if I can contact AVG and explain to them that Mozilla Maintenance Service is malware and see if I can get it classified as such to see if that'll finally get through to someone because I'm sick of this crap constantly being installed and forcing things on me whenever they want and not when I want.

Now after this update, every google search forces open my location service trying to force me to give location rights. This update is even more malware than all the other updates before hand. Firefox is getting extremely dangerous.

The add-on, Enhancer for YouTube, appears to be the cause of a very annoying bit of behavior. My YouTube tabs seem to be all numbered. I hate this. Why make a bookmark, I have to manually remove this number before I can auto sort my bookmarks directory alphabetically.

Worse, there is no part of the description that identifies this bad behavior as being involved with Enhancer for YouTube. I had to go to AI for help figuring out how to get rid of this exceedingly annoying behavior that showed up whenever I used tabs with YouTube videos. I can't imagine anything that this add-on could be adding to my experience that is more convenient than this particular behavior is annoying.

Changes to the appearance of tabs should not be performed invisibly and without settings that I can disable. Because of this, I can only get rid of his horrible behavior by disabling the entire add in. Mozilla put a stamp of approval on this particular add-in. So the dirt is on your face, too.