Firefox Community Forum

Hey there,

How can I change the css of pages created by an addon?

(Example-URL: moz-extension://285d678c-ecb3-4003-923d-835fc9d8e0bc/reader.html)

I know how to change normal pages css via different tools like Stylus etc. (or via userContent.css). But this does not work for pages created by addons.

Can you please help me?

I use the Feedbro-Addon, which creates an own tab. Its url is: moz-extension://285d678c-ecb3-4003-923d-835fc9d8e0bc/reader.html

If I use it as a normal tab (instead of a pinned tab) ... it survives a Firefox restart. But if I use it as a pinned tab (which I want) ... it disappears after a Firefox restart.

I suppose it has to do with it being an addon-page instead of a "normal" page.

Is there a way to make it stay permanently pinned?

Hello,

I'm willing to debug an older release of Firefox (ver. 98.0). In order to do that, since I don't want to compile, I wanted to download the debug symbols from Mozilla's symbol server. I followed the documentation provided about this service but I still can't make the server give me something else than 404 Not Found.

From what I understood, I tried fetching symbols using this URL : https://symbols.mozilla.org/firefox/firefox-98.0-Linux-20220304153049-linux64-mozilla-release-symbols.txt

But the file doesn't exist. The /firefox sub-directory doesn't exist either.

How do I properly use this service ? Thank you for your time,

Tim

Hi,

We are using firefox as the browser client for a webrtc based video streaming application. The other client is Gstreamer webrtcbin. The communication works fine with FIPS mode disabled, but it fails when we enable FIPS as part of security. The Gstreamer client sends an SDP offer to the firefox browser client, but it fails to create an answer and respond back. The WebAPI (RTCPeerConnection.createOffer) fails with below exception at application code.

"UnknownError: The operation failed for an unknown transient reason"

Also, tried to check some failure message in browser log and found as below. Not sure if it is related to the failure.

NS_ERROR_ILLEGAL_VALUE: Component returned failure code: 0x80070057 (NS_ERROR_ILLEGAL_VALUE) [nsICryptoHash.init]

System setup:

OS - OpenSUSE 15 SP3 Firefox version - 78.13.0esr (we also tried with version 91.10.0esr)

Any quick help will be much appreciated as we are stuck with this.

Thanks, Saurav

everytime I open firefox, it automatically switches tabs like these which require authentication to log in. even though their password is saved, I am still required to click in sign-in button.

Its really annoying that these kind of tabs get opened automatically, and then I have to switch back. Is there a way to disable this autoswitch or better, let the authentication happen automatically since the password is already stored ?

Every time I launch Firefox, it attempts to connect to a number of domains automatically; some of which, it strikes me, may not be entirely necessary and should, therefore, not be automatic.

For instance, I have automatic extension/plugin updates off by default, so why does FF try to connect to versioncheck.addons.mozilla.org and/or versioncheck-bg.addons.mozilla.org every time I launch it?

How many of the following do I actually need to give a pass to in my firewall and how many can I safely block?

I appreciate that a couple (e.g. githubusercontent) may be related to specific extensions/plugins, but the majority are from Mozilla/Firefox, so what what is each of them for, specifically?

aus5.mozilla.org ciscobinary.openh264.org content-signature-2.cdn.mozilla.net example.org firefox.settings.services.mozilla.com ipv4only.arpa publicsuffix.org push.services.mozilla.com raw.githubusercontent.com redirector.gvt1.com services.addons.mozilla.org versioncheck.addons.mozilla.org versioncheck-bg.addons.mozilla.org

Thanks.

When I open Firefox after starting my computer, all of my tabs from the previous session are automatically restored, and they take several minutes to load. I don't have the "Open previous windows and tabs" setting enabled. Is there a way to stop Firefox from loading these tabs each time I open the browser?

I'm using Firefox 103 on KDE neon 5.25.

When plugshare.com loads, there is a prominent search box at the top left corner. However it is missing the menu icon (see attached pic) as well as the search icon. This is happening on 2 different machines running Ubuntu 22.04.

Please fix. Google Chrome displays just fine; see attached pic.

Firefox update required me to restart Firefox. I was unable to save a bunch of work I had done in a particular tab because Firefox seems to have refused to connect to the site I was working at until I update. THAT SUCKS!

I have disabled DRM content, why is firefox annoying me to enable it each time I load a website that requires it. What seems to be now the general topic, even for a simple blog... If I disabled it, I do not want to be prompted to enable it back. I know how to enable it.

Hi all :)

From a fresh Linux Debian Bullseye I try to connect to a local machine with Firefox (v97 64-bits) by its hostname (avahi server with default domain "local") with the port 6180 bound to a remote web service port (61 is the distant machine IP and 80 is the forwarded port).

When I want to open this URL : http://bionic.local:6180/ FF displays "We can't find this site ... Unable to connect to server at bionic.local ... check your network connection and firewall"

BUT ping bionic.local works perfectly and resolve the good IP address from the Chromium navigator the same URL works without a problem, I can open the distant web site.

This workaround works : add a static resolution in the /etc/hosts file : 192.168.0.71 bionic bionic.local => so FF works in the expected way for now ! But as I said this a workaround and a bad solution.

I supposed too the port was blocked because I accessed an unusual port. So I tried this without success.

How the hell make that FF v97 allows me to use an unusual port ? Or is it bound to the domain "local" which is no more accepted by FF ?

Thank you in advance for your help. With adelphity, lnj

How to do

This is pretty much a duplicate of https://support.mozilla.org/en-US/questions/1334684 : I have the uBlock Origin and Skip Redirect extensions installed, both work by checking/modifying the URL of the site I am trying to visit.

Unfortunately, I am running into some sites that are re-directed via some tracking URLs. Here's one example I had today:

Original URL: https://sslh62px.r.us-east-2.awstrack.me/L0/https:%2F%2Fwww.allaboutcircuits.com%2Ftechnical-articles%2Fanalyzing-dc-and-steady-state-ac-circuits-with-python%2F/2/010f01832042551a-ed0a0774-ca39-4cd9-825e-a375504c6ea5-000000/c7T-m43jFRD5B3k49nHcvIOhCtM=71

As you can see, the destination URL is embedded within the tracker URL and as such, is exactly what Skip Redirect was designed to deal with. Unfortunately, uBlock Origin seems to look at the URL before Skip Redirect does and blocks it outright because it is a known tracker (awstrack.me).

If I could tell Firefox to let Skip Redirect modify the URL first (to https://www.allaboutcircuits.com/technical-articles/analyzing-dc-and-steady-state-ac-circuits-with-python/ ), uBlock Origin didn't need to block access to it.

Is there a way to change the order in which extensions are applied (i.e. get to run) when a URL is opened?

If I try to attach or download (only with the Always ask you where to save files option turned on) a file in any website, the browser doesn't open the Files window. Drag and drop works. I am able to choose the download folder from the settings and upload any folder, though.

I'm running Firefox 103.0.1 on Linux Ubuntu 22.04 LTS.

Setting `widget.non-native-theme.enabled` to false no longer works; I still get Firefox's default styling for controls and widgets.

I use a custom GTK3 theme in my environment that I want to apply to Firefox. The above setting works in 91 ESR, and broke with the upgrade to 102 ESR.

A custom user chrome stylesheet would be too painful.

Note: You can revert page styling to defaults in View -> Page Style -> No Style.

102.1.0esr, Debian testing, Xfce 4.16

I have a SonicWall firewall on our office network. I can log into it from an office workstation, but when I try to export/save its Configuration I get the "Secure Connection Failed" message. I've searched for a solution to this but have only turned up two:

1) Disabling SSL Scanning Feature in Your Antivirus Software.

2) By Changing the SSL Settings On Firefox

Neither of these are desirable. For option 1, this computer is using Windows Defender, and disabling SSL scanning is not a feature that I know of. In either case, these solutions are across-the-board and would affect all pages I go to whereas the only one I'd like to get to is this SonicWall device located on our internal LAN.

I recall that Firefox used to allow you to make an exception on a per-site basis. Is this no longer possible? Is there any other way to accomplish this without disabling SSL validation for all sites?

Hi guys!

Sorry for dumb queston, just Iam not a web-dev) My problem is next: I need change default code page (charset) for every document. Its only one charset for all pages, so it can be hardcoded. Due no one another charset web-server do not use.

 Can you pls say how it can be realized? Should it be done by changing some settings files, or maybe need some code changes ( for example at intl/locale etc) ?

Regards, Ruslan

Any advice returned by Google seems to be obsolete or only worked perhaps in older versions of Firefox. The main idea of using userChrome.css to override the default styles for Reader View does not seem to work. My userChrome.css file does work on other items though (like removing the sidebar width restriction).

Whatever advice I find via Google perhaps cites outdated CSS selectors, but current selectors do not seem to be documented anywhere by Mozilla. Moreover, I cannot find any file on my local drive named aboutReader.css when using find or grep commands in bash, those this file name is alluded to when viewing a page in Reader View and then in turn viewing source on that transformed page.

Moreover, addons that would allow me to change the colors seem to be restricted in Reader View.

It does seem like something has changed in recent Firefox updates but I can't remember when I last saw, for instance, links in dark mode Reader View that were still pink (whereas now they are blue, and impossibly dark to see, especially when you are disabling as much blue light as possible through your operating system). I need a higher contrast color for links in dark mode Reader View so I can actually see them.

I can alternatively use the Tranquility Reader addon and have custom colors, but A) that addon does not work with the Automatic Reader View addon, whereby I can always have various sites appear in some sort of "reader view" whether the native one or Tranquility Reader, and B) hitting refresh when in Reader View will defeat some soft paywalls but this does not work with, e.g., Tranquility Reader, so I still would prefer to be able to custom colors in the native Reader View feature, rather than rely on an addon.

1. Where are the current styles for Reader View even documented? 2. Is overriding them now restricted? 3. Why did the link color change from pink to blue in newer versions of Firefox (this is a terrible accessibility bug)? 4 .Where is the alluded to aboutReader.css stylesheet actually stored on my computer (it doesn't seem to be a file on the filesystem in the Firefox profiles folder, it seems more like it is embedded in the Firefox binary/executable)? 5. Will Firefox settings ever allow us to set colors specifically for Reader View (I don't mean the override settings for all web pages, particularly web pages not being rendered in Reader View ... that setting does not help in Reader View, nor would it be the desired preference for pages not in Reader View)?

Thank you.

Hi there!

I'm attempting to migrate my Firefox (106.0.3) profile from the Linux Mint V20.3 on one SSD to a new installation of Linux Mint V21 on a separate SSD. I'm using the information supplied on this page:

https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

Step 4, under Backing up your profile says: Right-click on your profile folder (e.g. xxxxxxxx.default), and select Copy.

This folder, qspfoqtl.default, contains 1 file, named times.json, the contents of which are:

{ "created": 1618792039414, "firstUse": null }

Clearly, not my Firefox profile.

There is, however, a folder named nnob5aww.default-release that contains a bunch of directories and files (505.4MB) with names like bookmarkbackups, browser-extension-data... storage, weave.

Is this documentation incorrect as of this release of Firefox? And, should I be using the nnob5aww.default-release folder as the profile? I'm a little confused. (Most often, I'm a lot confused.) Any help would be appreciated.

Thanks in advance,

- Ralph

I created a few virtual hosts and sites on my local machine and this is working perfectly.

Problem is with Firefox, when I enter non-existant url in address bar, Firefox force me to search and don't let me to open the url, but I need to go to this url for testing, developing, etc...

Any solution?

hello, i recently went from google browser to firefox, and i want to import my passwords. i did save all my passwords from google browser to .csv file, but when i go to settings>import passwords, it lets me choose the file, i choose my passwords.csv, and then-nothing happens. no loading, browser doesnt stop working, my folder where i choose csv from is just closing, but passwords doesnt import