Firefox Community Forum

I am sorry if this is not the place to ask this question. I am new to web development and have been trying to solve this issue for days. I have an ESP32 acting as an http server. I have developed web pages which have separate html, css, and javascript files. These work as expected when delivered locally (i.e. I double click on the the files), however, when they are served by the ESP the style sheet is ignored and I get the message

The stylesheet (url) was not loaded because its MIME type, “text/html”, is not “text/css”.

from Firefox debugger. The stylesheet is ignore across all browsers (Firefox, Chrome, Opera, Edge), however the error is only shown in Firefox. Normally, of course, I would expect an issue on the ESP32 side, however, the non-Firefox browsers do load the stylesheet (even tough they ignore it) and I am able to verify that the stylesheet is identical to the one served locally.

Oddly, if I open a Firefox tab and load the page, switching to developer mode causes several requests for the stylesheet and the styles are then applied. Subsequent refreshes of the page causes the style to be lost and closing/opening developer mode has no effect.

Although I have disabled javascript to try fix this problem, when javascript is loaded I get a similar message (except the javascript is loaded).

I believe I specified the MIME type because I exactly coped several examples

<meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" type="text/css" href="styles.css"> <title>My ESP32</title> Thanks for the help!

I am trying to watch channel 4 but I am told I have to unblock the ad blocker. As far as I know I have never installed an ad blocker - I would not know at all how to do this - I am not very computer knowledgeable....

i have tried to unblock but get nowhere.

Can you help?

Hello, in Firefox some Geek fonts are displayed as square shapes, in other browsers e.g. Safari are same characters on same website are displayed normal, using the last update of Firefox 128.6.0 Firefox ESR , is there any solution? Thanks

I've recently done a clean reinstall of Windows 11 and have noticed that, only for firefox (134.0.2, build ID 20250120135430), a few videos playback without any audio, yet the same videos play with audio when using edge as a comparison. Most (if not all) of these videos did play with audio in firefox prior to this reinstall.

Firstly, I'm pretty sure this is not a windows sound mixer issue since many videos on the same page and tab play back with audio just fine in firefox. The same goes for it not relating to the firefox setting 'Speaker selection', under (burger) > settings > privacy & security > Permissions because videos of different formats (or using different players) on the same page play back audio fine. The tab is not muted. Again, some videos on the same browser tab play audio fine; some of a particular format or player only play the video, while missing the audio (and where Edge plays the same video with audio).

Another common and potentially relevant issue I've seen is that, this being a 'Windows 11 N" install, it was initially missing the settings > system > optional features > Media feature pack, but that is now something I've successfully added. I should add that windows did report problems when I initially tried to add the media feature pack but, after a very long delay, it eventually appeared to succeed when I ran a couple of DISM incantations that I think ended with - "dism /online /add-capability /capabilityname:Media.MediaFeaturePack~~~~0.0.1.0"

I have the 'Play DRM-controlled content' setting enabled.

Comparing the firefox vs edge video playback on this video test page - https://tools.woolyss.com/html5-audio-video-tester/ I get the following results (don't know how to get it formatted/aligned correctly, sorry) -

                           FF vid    FF audio    Edge vid    Edge audio
av1-opus-sita.webm          Works     Works       Works       Works
vp9-vorbis-spring.webm      Works     Works       Works       Works
vp8-vorbis-sintel.webm      Works     Works       Works       Works
avc-aac-nerdist-friends.mp4 Works     MISSING     Works       Works
avc-aac-big-buck-bunny.m4v  Works     MISSING     Works       Works
avc-mp3-sita.mov            Works     Works       Works       Works

And perhaps also relevant is that there's also a difference in the audio-only samples further down the table on the same page -

                   FF audio   Edge audio
audio-sample.mp3    Works      Works
audio-sample.weba   Works      Works
audio-sample.ogg    Works      Works
audio-sample.opus   Works      Works
audio-sample.flac   Works      Works
audio-sample.wav    Works      Works
audio-sample.m4a    FAILS      Works
ac192.mp3           Works      Works
spoonradio-hd.aac   FAILS      Works
audio.opus          Works      Works

Also, every 'v.redd.it' / reddit-video-player video plays the video fine but has no sound when using firefox but plays both sound and video fine with Edge. Here's one for example - https://old.reddit.com/r/funny/comments/1i7y1nr/rock_paper_scissors/

I've seen lots of similar (but not identical) issues on firefox video with no audio problems with suggestions a few things to try. In addition to what I've already mentioned above, I've tried the following without success -

- Restarting windows - Restarting firefox - Restarting firefox with addons/extensions disabled - 'about:support' > Refresh firefox - 'about:support' > Clear startup cache - (hamburger) > more tools > task manager > (click the little profile icon for the page playing the video) - I've checked the settings suggested here: https://support.mozilla.org/en-US/kb/fix-common-audio-and-video-issues#w_check-some-firefox-settings

I realise it may be possible to side-step this problem by flailing around with more drastic work-arounds like trying a clean re-install of windows or a full uninstall and clean of firefox, but that doesn't really help figure out the problem, which leaves the possiblity it could easily happen again to me or others when it might be something that can be more properly fixed or guarded against in firefox itself, so I hope someone can suggest what might be done to home in on identifying the cause of the problem and so learn whether a more precise fix can be employed.

I somehow changed by background color from white to black in Firefox. I have tried the suggestions in the articles and it did not change it back.

This happened when I hit ctl-alt-prnt/screen to print a page.....I cannot get it changed back to white. What next??

So my internet speed is around 100 Mbps but i only get 10 to 12 Kbps when download a small file, idk why because i tried using ethernet and it is still 10 to 12 kbps (sorry for bad english)

Bonjour,

Lorsque j'enregistre un mot de passe (et malgré le message m'indiquant qu'il a bien été enregistré) aucun mot de passe n'est enregistré dans la rubrique "paramètres". Idem pour les marques-pages.

Pourriez-vous m'aider s'il vous plaît ?

En vous remerciant.

Cordialement.

Raphaël MICHAUX

Good day,

I have since like more than half a year the issue that during Video playback with Firefox (no matter if private browsing or not) the screen standby time from My Debian 12 with Mate Desktop OS is functional, but it wasn't the case in past mid-term (also other website Video playback trigger that setting, while for example VLC keeps the screen alive, although the setting isn't changed).

Why does Firefox no longer surpress the energy saving option of the screen standby time; does Debian 12 (Mate Desktop) have a change or something else?

Thanks in advance!

Regrads from Germany, Johannes

A video of what is happening . This only happens when I search something up, for example, if I search more than one thing up on Pinterest, Google and sometimes Youtube . . . I'm sure it's not related to any extensions, the only one I installed recently was Privacy Possum, but after noticing this issue I deleted it and it didn't resolve the issue.

Help me Please it's Killing my Eyes

With Respect, Thomas Snell

h i can not open my sites showpm And https://www.isaimini.city/ isaimini

An errant setting on my backup program wrecked havoc on my FF profile. I have a backup from two weeks ago which I can go back to, but I'm trying to figure out how to get my browsing history from the past two weeks over to the restored profile.

Some options I thought about: and for clarity, the newer but bad profile is still loadable, I've mainly lost all my extension settings and stored data

• Is there any tool that would sync the entries from the newer/bad profile to the older/good profile?
• If I restore the older/good profile, would FF Sync just add back in the newer entries -- which presumably it has saved in it's system over the past two weeks?
• I believe the places.sqlite" file from the newer/bad profile is still intact. Should I just copy that to the older/bad profile?