Firefox Support Forum

Every time I go onto Youtube to watch videos I can hardly even watch the videos. This glitchy mess usually happens with videos that aren't constantly in motion, like a very static slideshow. The glitch affects the video area only, and appears like 2/3 of the video has bee stretched like it's being smeared or is "raining pixels." In a few cases it's a lovely dithered effect that looks like a teenaged girl's first go with eyeshadow. For the love of all that is holy, PLEASE HELP. I am but a poor whelp that is being fed videos through an IV daily, and I cannot take my hits when the smack is so trashy.

Sorry, I took 3 screenshots but firefox isn't accepting them for some reason ...

My most visited sites as a little pictures on start page disappeared and also every other new tab i open ..used to be the same (showing most visited), but now it just shows yahoo.com. How can i change it back ? When i try from Tools > Options > Home Page(Use Bookmark), then i choose "Most visited" ( on home page ), then it shows this: "place:sort=8&maxResults=10", which doesn't work when i start Firefox.That is how it used to look before. That is what i want, but don't know how to get it back. This example is with Chrome, but the same was appearing for me, but with Firefox: http://www.computerworld.com/article/2485093/internet/chrome-users-oppose-change-to-google-s-new-tab-page.html

Basically a lot of websites wont work on my firefox with windows 10, such as google, youtube, twitter and facebook, the error i get is:

This Connection is Untrusted

You have asked Firefox to connect securely to www.youtube.com, but we can't confirm that your connection is secure.

Normally, when you try to connect securely, sites will present trusted identification to prove that you are going to the right place. However, this site's identity can't be verified. What Should I Do?

If you usually connect to this site without problems, this error could mean that someone is trying to impersonate the site, and you shouldn't continue.

This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox only connect to it securely. As a result, it is not possible to add an exception for this certificate.

I keep my browser set to remember my open tabs when I close Firefox. Since the most recent update, however, I have been unable to make this happen. I checked in my preferences and the option to remember tabs when Firefox is closed is still selected. When I go to close Firefox, however, I get the "you are about to close X tabs" message and all tabs are forgotten. When I open Firefox again the tabs I had open are all gone. I have tried re-selecting the "save my tabs" option multiple times but it has not made a difference in the browser's performance, though the settings are always correct when I check again. I am unsure of what to do about this issue, but it is rather maddening and I would really like to find a solution, preferably before the frustration induces me to find another browser to use.

We can type in any other app on the computer, but not Firefox. If Firefox is active, keyboard commands do not work. It does not accept typing in the Awesome Bar, and we tried 4 different websites with forms. None of them register typing. We even tried the touchscreen keyboard. It also works in any app we try, but NOT with Firefox. However, mouse commands DO work, which is how this information was entered.

We use Firefox for our small business. Having all the passwords saved in one browser is handy. But today we'll have to find or reset each one while we use another browser until this issue can be cleared.

Using a Dell laoptop running updated Win 8.1, and the latest version of Firefox available for update. Anything that can be updated, has been done. Any suggestions? .

When I open a fresh tab, comes up with Yahoo search page. I have gone in options repeatedly to remove Yahoo, set Google search as my home page, and set Google as default search page. Just keeps reverting to Yahoo.

I didn't update I didn't add any plug-ins I didn't do nothing but browse SAFE websites and all of a sudden Adobe Flash Player stops working every so often and Mozilla asks me if I want to allow it to work?

I pretty much always want to view PDFs in "page width" but the default "automatic zoom" setting always displays them to fill the height rather than the width of the window and I have to change it manually every time I view a PDF. Can I change this setting somewhere?

Okay. I have tried synchronizing my time with time.is , uninstalling Kaspersky, clearing my Cookies and Cache, disabling IPV6 in about:config , reinstalling, refreshing, uninstalling conflicting and non-updated addons and extensions, deleting the db file, setting the settings to "No Proxy", disabling Windows Firewall...

...And this is still happening:

" The certificate is not trusted because the issuer certificate is unknown. The server might not be sending the appropriate intermediate certificates. An additional root certificate may need to be imported."

"(Error code: sec_error_unknown_issuer)"

(Additional Note: Google only works if http://www.google.com/?gws_rd=ssl is specifically typed in without the S.)

The Netflix support rep states that I now need to remove Firefox for 64-bit OS and install 32-bit Firefox, which I don't even think is possible. I have Windows 7 Pro 64-bit. Netflix was working fine until the Microsoft update ran 36 hours ago. Now only Internet Explorer will successfully run Netflix content. I uninstalled and reinstalled Silverlight, restarted my PC, and no dice.

I have heard that Firefox will no longer support the Silverlight plug-in as of September 2015: does that mean all automatic updates will disable the Silverlight plug-in and it will have to be re-enabled, or does this mean that platforms depending on the Silverlight plug-in will simply cease to work in the Firefox browser?

Accessing some of my Hardware to make changes has become impossible with the latest attempt to secure TLS or Weak SSL certificates. I cannot access my Modem via https://192.168.1.1 as FF is not accepting the certificate from the device. This change is very new and not quite refined correctly yet I believe.

I am using windows 7 and Firefox 39.0. Recently when I open Firefox it gives this error, "The procedure entry point PK11_PubDerive could not be located in the dynamic link library nss3.dll". I click the okay button, and then Firefox loads without any other side effect. But this is becoming rather annoying and I would like for it not to throw an error message at me. I have tried uninstalling Firefox (everything so even when I search for it nothing comes up) and re-installing it. But the message is still there. I am lost as to what to do to get rid of it. Any help would be great!

Thanks!

Hi, I accidentally chose black for both my font color and background. Since everything is black, I can't see the text in my Preferences window (or Add-Ons) to change it back.

Any ideas on how I could do this?

Thanks! NC_P

I'm using HTML5 player - other browsers work perfectly. If I use flash it still works perfectly, but I would like to use HTML5 because flash is really resource hungry :)

It's not like a black screen or something (I've read similar, but that's not my problem), basically no better than 360p shows up as choice. The following formats are available in my browser: http://i.imgur.com/Vule02S.png

I'm using the latest stable version of Firefox, but I tried several ones, like Nightly, Waterfox, Cyberfox etc. None worked ( probably because the engine is the same :P ). I tried to clean reinstall Firefox, I deleted every small trace from my computer & even cleaned registry. Still nothing. At the moment I'm on a clean version of Firefox, no extensions, no themes, no modification, nothing. Didn't help, I still get only the 360p choice.

If you need any further details please tell me, I will gladly provide any information. I hope we can solve it as fast as possible :) Thank you!

(P.s.: I've got Windows 8.1 x64, but I don't think it would influence my experience)

I installed Kaspersky Internet Security today and discover it has installed 3 add-ons I can't disable: - Dangerous websits blocker - Safe money - Virtual keyboard I think I even said "No" when I started up FF and was asked if I wanted to install them. The only option for them is "Disable" - there are no "Options" or "Remove" buttons as as other add-ons have. But if I "Disable", on re-start they are enabled again. Thanks for any advice.

a) I opened Firefox to a totally blank page (no tabs or anything), and a titlebar (which I normally don't have) said "Mozilla Start Page." b) I closed it and reopened Firefox again, and my previous session was missing. The two places were you can restore your previous session from were greyed out. c) Following instructions provided to other users, I went looking for my sessionstore.js file. I didn't have one at all, so I created one renaming previous.js. Sessionstore.bak would be no help, as it was created when I reopened my browser. d) Of course, because I didn't have an original working sessionstore.js, creating one didn't work. e) Before you ask, yes, I do have "restore my tabs from last time" configured.

Any ideas? I'd love some help, please!