Firefox Support Forum

Using Firefox and accessing my gmail account. A notice comes up saying "A pop up blocker may be preventing the application from printing the page. If you have a popup blocker, try disabling it to open the window". I have no idea how to find what this pop up blocker is so I can disable it.

I think the title covers it. Until recently, pressing the <Backspace> key on the keyboard would take me back to the previous webpage. Now it doesn't.

Using FF v87 in Win10 Home.

Following a Windows 10 update, I tried to open Firefox and the following popup message appeared. "the code execution cannot proceed because VCRUNTIME140_1.dll was not found. Reinstalling the program may fix this problem." I have tried several times to download the latest version of Firefox, but during it's installation the same error message appears. How can I fix this problem and get Firefox to work normally.

Firefox has been awesome. But, my computer just updated to windows 11 and now it doesn't work. Sometimes I try to open the browser and nothing happens (but I somehow end up with something like 7 instances of it running in the background, according to task manager), sometimes I get it to open, but it won't load my homepage or anything, and sometimes it seems to work fine but only for a little while - then it just stops responding.

I have no idea why this is happening or how to fix it. I tried the browser reset, which helped for a little bit but then the problems came back. I think having a theme installed makes it worse, but now I can't even get settings to open so I can try turning it off to see if that helps.

Any ideas? Not being able to use the internet on my computer is a pretty big deal. I'd prefer to not switch browsers, but I don't know what other option I've got at the moment.

Thanks!

My tab bar and menu bar background is white. I have the latest FF version and I hear it should be black but it isn't. It used to be but I may have changed something and lost it?

How do I make it black for ease of visibility - but not the web pages (just the upper bars). I have searched for hours and none of the answers either match what to do, or work.

Firefox updated. After updating, whenever I try and load Firefox, I receive the following error message:

"XULRunner

"Error: Platform version '91.0.2' is not compatible with "minVersion > = 91.0 "maxVersion < = 91.0"

I click, "OK" to confirm... and Firefox closes. When I try to update Firefox once more, I receive no response from teh System. When I try to load MaintanceService, I receive no response. What's teh deal here. Any answers?

I'm using Firefox 85.0.2 . . . I was doing this (below), to customize my header and footer, but in this version of FF, I no longer see this in Options - only in: about:config . . . keyword "footer" . . . there, I would have to change it for 5 different ways of printing (to printers or to PDF)

I need to get rid of printing the URL in the footer - many times, it's too long, and I don't need it.

Where did the Page Setup option go?

I see in the current Print Options, you have to go to - More Settings / Margin / Custom - to see those. Why would they put this so many levels down?

It used to be: File / Page Setup / Margins & Header/Footer . . . "Customize" Headers & Footers:

Option 1 (left) . . . there are two leading spaces:

 > > &T
 > > &U . . . &D . . . &PT

Option 2 (left) . . . get rid of the ">"s, and just have the two leading spaces:

 &T
 &U . . . &D . . . &PT

In most standard Windows applications, the title bar and tab colour follows the default Windows settings, e.g. (in my case) the title bar and tab colour of active application windows is blue. This is true even in Thunderbird. Since FF 89, title bar and tabs are something between white and light gray, which is extremely user-un-friendly. FF developer team should return to the previous colour scheme. Yes, I know the circumstances of free software but this is NO excuse to alienate millions of users. Developers that change fully functionable software just, well, just to CHANGE it should consider that they are doing WRONG. Could anyone tell them? I am just user, not developer and I am not willing to learn developer tools like BugZilla just for this simple guiding principle.

Hi, I can't install Firefox and I don't know what's going on here.

Yesterday I installed the latest version of Firefox and it worked fine. Then, I turned off the laptop and the next day when I was going to use Firefox, it didn't load any pages. Edge was working fine, Chrome was working fine, but Firefox was not working. Trying to fix the problem, I decided to uninstall Firefox and installing it again. In order to clean even more the previous installation, I even manually deleted the C:\Program Files\Mozilla Firefox folder to remove all possible traces. I restarted the laptop and downloaded again the Firefox installer. I don't know how, but the installer detected that I had already installed Firefox before. I unchecked restart Firefox and hit the button to continue with the installation. After this, was impossible to install Firefox again. I got a message saying that the installation cannot continue because the VCRUNTIME140_1.dll was not found. The message said that this problem can be fixed by reinstalling the program, but that is not true, everytime I try to reinstall it, I get again the VCRUNTIME140_1.dll error.

After this, the installation stops and the Firefox icon appears on the desktop, but it doesn't install properly the software and when I open it, I cannot browse the Internet.

Do you know what's going on here and how to solve this?

Cheers

Alright, basically I backed up my PC before I wiped it. Then decided to move from chrome to firefox. But there is an issue, I can't migrate my passwords because google chrome will not read my old LOGIN DATA file and refuses to create a CSV either. So basically I can't import about a decade worth of passwords into firefox because of a flaw in chrome's design, fantastic.

So I thought, well, surely if there are program that let you read SQL files (such as the LOGIN DATA file) if you have the password, firefox must be able to do this to right? Well no. Apparently not.

I am not sure if this is the correct place to formally request a QoL feature but I would really, REALLY, like to be able to import my passwords directly from chrome's LOGIN DATA file, I have the master password.

It was my mistake to back up my files thinking that would be enough, I should have known better and double checked if chrome could not read its own native files. But now im screwed. Help. Please.

In Settings/Applications, have "JNLP file" set to "Use Java(TM) Web Launcher (default)". This is used in Oracle's Agile to view documents. In previous versions of Firefox when selected, the file would open using Java to display the document from Agile. As of Firefox 97, now only "Save File" or "Cancel" options are offered. What happened that this functionality has been removed?

I got a new Lenovo Laptop and cant get Firefox to load a webpage. Here's what happens and what I've done 1. I install Firefox and during install get error below, VCRUNTIME140_1.dll Not Found. I then click OK and Firefox Installs but when I load it no webpages will come up just a black screen no indications it is even trying to load the page, no error message. It does nothing. Cant even open Google.com 2. I looked in MS forums and they say to install Visual C++. Did every x86 and X64 version I could find. Still have the problem even after uninstalling Firefox and reboot. 3 Have McAfee, and took Firefox off the Safe list then put it back on. 4. Went to try and find the file but can't on a reputable website. So I looked for this file on my Dell Laptop and Asus Desktop. Both have Firefox installed and it works fine. Get this, NONE of my other two computers have that exact file name anywhere. VCRUNTIME140_1.DLL! They have 140.DLL and a few other 140.dll with different variation but no 140_1.dll? So how does Firefox run on 2 other computers without this DLL but not on this new one? They are all Windows 10 Would appreciate any help. Seems to be a Firefox or Lenovo Issue just not sure. If anyone know how to get the DLL from MS let me know.

Hello,

I just upgraded to Firefox 87 and noticed that I wasn't able to go back to the previous webpage by clicking on the backspace button like what I have done in the past if I'm not using a mouse on my laptop and had to click on the back button in the toolbar with the trackpad. I'm not too sure of why that happened with the upgrade and was a little surprised about that. Hope I can be able to get around this in some way if one of you know anything about this. Thanks.

Hello. After reading numerous posts addressing similar issues & having no success, I've decided to post a question of my own. I am running the current version of firefox, 94.0.2. I use the Search Bar religiously for searches to sites like google, wikipedia, youtube, amazon, and ebay. I NEVER use the address bar for searches. I have attempted to disable all functionality associated with searching via the address bar. When I go to the address bar, it is because I have a specifc url I know I want to type with a specific destination in mind. Occasionally, I have a need to just go to the home page of one of my search sites, most often it's amazon.com. Recently (not sure which version of firefox) I've found when I go to the Address Bar & type amazon.com, I cannot just go to amazon.com, instead the address bar turns into a search bar. How do I disable this? Its driving me mad! I swear I've disabled every option I can within about:config related to urlb. Please Help. I don't want to switch to Chrome, but I'm tired of my settings getting messed up every time mozilla pushes a new version.

I, today, found that Firefox 88.0.1(64bit) sends "/nice%20ports%2C/Tri%6Eity.txt%2ebak" to an website. What is this? Am I infected? The Apache log at the HTTP server is as follows:

192.168.1.188 - - [10/May/2021:07:42:41 +0900] "GET / HTTP/1.1" 200 665 "-" "Mozilla/5.0" xps8940 192.168.1.188 - - [10/May/2021:07:42:42 +0900] "GET /nice%20ports%2C/Tri%6Eity.txt%2ebak HTTP/1.0" 403 - "-" "-" 192.168.1.188 192.168.1.188 - - [10/May/2021:07:42:42 +0900] "GET / HTTP/1.0" 403 - "-" "-" 192.168.1.188 192.168.1.188 - - [10/May/2021:07:43:58 +0900] "GET /Picture/MicroS5S.gif HTTP/1.1" 200 3042 "http://wista.jp/Index.htm" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:88.0) Gecko/20100101 Firefox/88.0" xps8940

The server is located within my home LAN. 192.168.1.188 and xps8940 is the captioned machine that sends this unknown protocol. Tested by Chrome and found no such protocol sent. Could any guru enlighten me? Tak

British English Spell Check as you type is no longer reliable, sometimes it works but most times it doesn't. Can't seem to get to the bottom of the problem, all settings are correct but still doesn't work properly.

Please help, I just screwed up so bad I accidentally pressed the red "close" button on Firefox on my Mac instead of the yellow "minimise" button and lost a bunch of tabs I need (they were from a while back so not in history)

There is no option to "restore previous session" or "reopen tabs" is there any way whatsoever to recover my lost tabs I am freaking out big time there was some really important stuff in there that I hadn't bookmarked yet like an absolute IDIOT!!! My session had stayed active through computer being shut down and restarted and Firefox updates but pressing the red "close" button has seemingly nuked it. Is there a way to go into folders and find the tabs? Anything please help :(

Any help appreciated, I'm desperate.

WidevineCdm plug-in crashes everytime when I try to play disney plus or amazon prime. I fit the requirements via the disney plus site. Can anyone assist? I was streaming fine last week and now its not working.