Diễn đàn hỗ trợ Firefox

hello! i've been having an issue with mozilla where webp images are not loading at all. this is especially prevalent on youtube, where thumbnails simply do not load, as well as on tumblr, where if an image or gif is a webp file, it will refuse to load. both are attached in the image below to see the difference between firefox and chrome, as the images load fine on chrome. as well as that, discord, when opened with browser instead of the app, does not load profile pictures, server icons, or custom emojis. google hadn't helped me at all, and i don't know what to do at this point. i don't want to go back to using chrome.

in the attached image, the top images show a set of shark sculptures. the first does not load on mozilla, and looking at the image file, it is a webp. the second image is revealed to be a jpg, which mozilla treats normally. in the second set of images, there's a quick look at a random youtuber's page, the top being mozilla and the bottom being chrome, and you can see the mozilla thumbnails do not load.

thank you for reading! i'm very confused and am unsure what to do. any help is appreciated!

When I'm trying to go to a specific website, it doesn't connect with an error code "SEC_ERROR_UNKNOWN_ISSUER". I was able to press a button labeled "Accept the Risk and Continue" before, but the button seems to have disappeared?

I've been watching and following along with a Unreal Engine 4 Course on Youtube for some time now (mentioning in case the resource usage has something to do with it), and in the past couple days I've noticed a pretty serious and annoying bug. When I pause the video, tab (Cmd + Tab on MacOS) into Unreal Engine, do some things, then tab back and resume the video, it will play for one frame and then stop and buffer, but the audio will continue playing. The only way to get the video to resume is to skip forward/backward in the video (either with the arrow keys or the progress bar). I've also tried Troubleshooting/Safe mode and the issue still persits.

When I go into fullscreen on firefox macos, hovering near the top shows the traffic lights (fullscreen, minimize, close window buttons) and moves everything down. This may be expected behavior, but it is very annoying as when you try to open new tabs the tab bar moves out of the way of the traffic lights, and the traffic lights area is around the size of the tab bar. Is there any way to make the traffic lights always visible or keep them from moving?

I've been searching for a solution on HOW to edit HTML files (for websites) on my new laptop. I used to use IE11 (Internet Explorer 11), on Windows XP / 7 (32 bit), which worked spot on, the steps were as follows: (I write websites from scratch most of the time) 1) Click on, say, index.html 2) IE11 shows the actual page 3)Click on View/ Source 4)The source code shows up in Notepad 5) Edlt the code, Save and click Reload the webpage. You can straightaway see the changes.

Currently my new laptop runs Win 11 pro, Microsoft does NOT support IE11 anymore, I can however run IE11 as a add-on, BUT it does not work very well . I also tried a couple of free dedicated editing programs also, BUT they are exceedingly clumsy to use and can't equate to the old IE11 at any level. Somewhere I read that Firefox ( i have v115) can emulate what IE11 could do, hence I am on this forum posing the question, as i can't find the solution,

Anyone in the same boat?

Please share your ideas, Many thanks

How do I remove the scam pop-up that won't let me access firefox on my iphone? The pop-up says "your apple iphone is severely damaged." I can't open a new tab or delete the current tab.

I get this when trying to get my email from Comcast:

Secure Connection Failed

An error occurred during a connection to oauth.xfinity.com. PR_CONNECT_RESET_ERROR

Error code: PR_CONNECT_RESET_ERROR

   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.

After Firefox upgraded from 114.02 to 115 menu and tabs background color changed:

FF 114: https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2023-07-05-17-00-30-1a3adf.png FF 115: https://assets-prod.sumo.prod.webservices.mozgcp.net/media/uploads/images/2023-07-05-17-00-34-cba7e0.png

These are screenshots of active window. When window of v115 becomes inactive, background color changes to lighter, but still no visible horizontal line between menu and tabs. I don't use any additional themes, "System theme — auto" is selected.

From release notes for FF 115: For users with a Firefox Colorways built-in theme, the theme will be automatically migrated to the same theme hosted on addons.mozilla.org for Firefox profiles that have disabled add-ons auto-updates. This will allow users to keep their Colorways theme when they are later removed from Firefox installer files. I guess it is relevant somehow, but i never installed Colorways and don't know what is it.

How to make FF 115 look like it was in 114? I can see changes in `browser/themes/` in sources between 114.02 and 115. Is it possible to "extract" default theme from 114 and install/apply it to 115?

I use Firefox under Fluxbox window manager in Arch Linux, if it matters.

When I play a video in fullscreen, there is a strange black border that appears around the video which makes the content smaller than it would otherwise be. This border does not display in Safari or Chrome, just in Firefox. It also occurs in every media player I've tested, including YouTube and Netflix.

Annoyingly, I can't get this to show up in a screenshot. It seems like Firefox guesses the aspect ratio or resolution wrong when it puts media in fullscreen, and it has the effect of downsizing the actual interactive part of the display. Meaning, I can't move my mouse into the border area to take a screenshot of it.

I'm on an ARM Macbook running MacOS 13.5, if that matters.

Is this a bug, and/or is there a way to fix this?

Hello. I recently moved from windows to Linux Mint, and noticed the behavior of the Picture in Picture window is different when resizing. On windows, the aspect ratio is kept. while on Linux, it is free form, making these black bars around the video, so I have to resize it very carefully to not show any black bars.

How can I make the PiP on Linux behave like on Windows? That means resizing keeping the aspect ratio.

Attached are the comparisons between Windows and Linux Mint.

Thank you very much!

I have my Firefox Firefox Privacy & Security History settings set to 'Always Use Private Browsing Mode.' Yet every time I open Firefox and visit the History tab, 'Recently Closed Tabs' shows a history of the websites I've visited. How do I disable this feature?

I noticed that someone else had this question, but instead of answering it, it just got archived.

When browsing Youtube, the browser Back Button doesn't work. For example, if I start on the Youtube main page, then click on a video, it will show the video. But then, when I click the browser's "Back" navigation buttion, it does not take me back to the main page. The URL in the address bar will be the main page, but it will continue to display the video I just watched instead.

This only seems to happen on Youtube. It's been a problem for a while - possibly as much as 2 years or even more. And it doesn't happen every single time. However, it has been happening a lot more frequently lately.

It's almost as if Firefox just doesn't want to refresh.

I've tried clearing the cache. The problem persists. I've dried disabling all add-ons. It still happens. I've tried running it in troubleshooting mode. Still a problem.

I've tried to duplicate this in Microsoft Edge; it doesn't seem to happen there.

When I launch Firefox (version 115.0.1), it establishes and maintains multiple connections to '*.googleusercontent.com' until I close Firefox. This is bull shit is totally unacceptable. I have been using Firefox since version 1.0.6 but I will dump Firefox for another web browser if this problem cannot be fixed.

How do I stop these connections being made?

After removing elements from a website with another add-on, I'm left with a considerable white gap at the top.

I can manually change (pointless) the margin-top property to -100px, but how do I do this with the Stylus add-on?

Stylus doesn't like negative values:

margin-top -100px

10:20 Expected "{" but found "-100px".

Is there a lighter/simpler alternative to Stylus?

If you have multiple tabs open and you hit Ctrl-T to open a new one, it opens it at the end of the tabs, and the cursor focus moves to the URL bar so you can start typing in an address/search.

If you right-click on any of those tabs, it opens a new tab to the right of that tab, instead of at the end (which is what I want, as right-clicking on a specific one to open a new tab, to me, means you are linking those tabs in layout and want them together) BUT the cursor focus DOES NOT move to the URL bar.

This seems pretty counter-intuitive, and means that so many times I right-click, Open New Tab, and start typing a URL and then see that I have to stop typing, click in the URL bar, and start typing all over again.

Is there an about:config to force the focus to the URL bar, or is this a bug? If there's no setting for this, I would definitely consider this a bug because you have 2 different behaviors for New Tabs.

Any extensions I install suddenly don't show up in my toolbar or the customization menu anymore, so I also can't drag them there manually.

Deleting the extensions and re-installing them didn't work, neither did deleting the extensions folder itself.

Does anyone know how I can fix this? I've attached a screenshot of the customization menu and extensions menu below.

Thanks :)

I am currently running Firefox on High Sierra 10.13.6 and have been advised that that OS will soon no longer be supported. I did have an option to do an update to ESR 115.1 in my Firefox app, however I was not home for a few days and when I returned planning to do the update it was no longer available. Now it just says my Firefox is up to date with 115.0.2... how can I get the update to the ESR 115.1? Thanks!

Whenever I type something in the URL bar that starts with the word "amazon," instead of getting a Google search for what I typed, I get redirected to Amazon.com with whatever I typed as a product search. For example, if I type "amazon sucks" in Firefox's URL bar, instead of getting a Google search for the phrase "amazon sucks," I get an Amazon page with the word "sucks" pre-filled in Amazon's product search (and a screen full of socks).

I don't have a search keyword for "amazon" in my Firefox settings. As far as I can tell, no other magic word does the same thing. (For example, if I type "yahoo sucks" or "walmart sucks," I get the desired Google searches. I don't get redirected to a Yahoo or Walmart page.

How do I turn this behavior off?

So I'm using firefox on my old PC and want to export the login data to my new PC. Firefox has export passwords to CSV but there is no import CSV in firefox on the new PC. There's import HTML but... firefox exported to CSV not HTML so I'm really confused, why would it export to a format that cannot be import?