منتدى دعم ”Firefox“

On saturday our global sertificate expired and we renewed it a bit late. Now Firefox users cant visit our site, seeing this error message.

   Secure Connection Failed. 
   Please contact the server administrator or email correspondent and give them the following information: Your certificate contains the same serial number as another certificate issued by the certificate authority. Please get a new certificate containing a unique serial number.
   
   Error code: SEC_ERROR_REUSED_ISSUER_AND_SERIAL 
   
   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. 
   Please contact the website owners to inform them of this problem.

Unfortunately the only way to fix it we found is deleting the whole profile, deleting the sertificates themselves does not work for us. It is very difficult for our users to do it. Can you please help us with this problem?

Several days ago (approximately 12-3-20) my Internet Download Manager add-on stopped working. Removing it and reinstalling it by using a link provided by IDM does not work. It will work only if I open the webpage where I intend to download (e.g.--YouTube) BEFORE I reinstall the add-on and only for as long as that page remains open. Closing the page and then reopening it somehow deactivates IDM, as it will no longer link to the video I want to download. Have tried everything i can think of to solve this, including deactivating all other add-ons and by uninstalling and reinstalling the IDM program itself. I also unchecked the "block popup windows" management tool within Firefox itself. Anyone have any ideas what is happening? Initially, I also received the error message added below, but as far as i can tell, none of my other programs are set to block IDM. The error message no longer appears.

Hi guys,

I don't know when and how exactly this thing was added to my firefox behind my back, I don't like it, I don't like Baidu Pan either but I have to use it.

I checked the extensions and add-ons, nothing suspicious was found.

Can you please help me remove it?

Firefox browser does not open with home page set in settings. Occasioally it will. If home icon is clicked it will. Most of the time it opens with blank New Tab.

# My problem

When i go to some site with video (for example https://www.openproject.org/ ) i have the following message : "To play video, you may need to install the required video codecs".

# Spec

I run Firefox Beta in Fedora, it's installed in /opt/ folder. I have the "normal" version of firefox too and the video works well.

# Some other infos

The video seem to be a mp4 video and i have the following package installed in my fedora GStreamer Multimedia Codecs (Multimedia plauback for APE, AVI, DV, FLAC, FLX, Flash, MKV, MP4, Speex, VP8, VP9 and WAV).

The ability to edit and customize the headers and footers for printing was one of my main reasons for switching from Chrome to Firefox. Now I can't find where to do this. I don't know if it was a recent update or what but I am using Windows 10 Home. Please help so I don't have to find a new browser.

How do you access Mozilla VPN after you have logged into firefox account - it only shows how to download and I have already downloaded it. I simply want to turn on the VPN and select the location but no instructions are available for this or at least the instructions are not clear.

Why can a stupid failing script on a web-page, or even intentionally so programmed script disable the copy (and sometimes paste) functionality?

How can this be disabled/fixed?

One highlights a text (any text) on some web sites, Edit menu allows Copy, context menu allows Copy, one hits Copy, nothing happens. It's not even a page where someone wanted to "copy protect" some information.

Copy and Paste should work just as advertised since those were invented, how hard can it be to get that right? Even stupid Notepad never fails at it. And no, I don't care what the idiot who programmed a page though would be/should be best for me, I want Copy to be copy, Paste to be paste. This used to work in "original" Firefoxes even when page developers wanted to make it not work.

And yes, while on a given page Copy fails miserably, at the same time in other pages it works.

Firefox won't open my professor website: https://danielesirangelo.altervista.org/ and there's this error How can i fix this?

Hi,

Google Chrome have just dropped an update featuring Tab groups. Holy smokes it is good.

As somebody who frequently has over a thousand tabs open, this is such an awesome feature. Any chance of Firefox getting it?

PS Love Firefox, great browser!

Re: "In your firefox preferences, choose language and appearance, under font, check you have background set to white, and text set to black."

Any screenshots for this example? I use 8 different browsers and Firefox is the most counter-un-intuitive browser I've ever used. Why would Settings refer to "Language" to set the background color? There is no link that I can use to Fonts and Colors under Language and Appearance to change the background color. All I can do is select a Default font, Size, Advanced, and Colors. But In colors the Background is evidently set to white but it's actually black. So I must map my way around Text and Background, Text, Background, Use System colors, Override the colors specified by the page with your selection above, Only with High Contrast themes, Link Colors, Unvisited Links, Visited Links, Underline links.....yada yada yada blah blah blah.