Firefox Support Forum

Many file types are no longer listed under Settings > Applications>Content Type at about:preferences#general. I used to be able to click on a file in an email like a Word or Excel document, and it would come up on my screen. Now Firefox asks me to Save them. I don't want to automatically save files without first looking at them. How can I get those file types in the Application list again?

I have attached a pic of the file types I have left to chose from. There used to be a lot more. How can I get back all the missing choices I have had there for years?

How to change the Tab color for inactive tabs?

I have a userChrome file and have been able to change the color of the active tab but cannot do so for the inactive tab. The inactive tab color blends into the toolbar color. If I move my mouse cursor over it changes to a slight darker gray color.

Active tab color. I made mine a off white color:

.tab-background[selected="true"] {

   background-color: #f9f7f1 !important;

}

I need to constantly jump between google search and wikipedia and i hate using the mouse. Normaly when you click the url bar you can type "@wikipedia" or "@google" to change the search engine to wiki, while typing anything else will prompt a google search. BUT when you use the shortcut "ctrl + e" or "ctrl + k" a box appears in front of the url bar with "Google", just like it would whe you typed "@google". This actually blocks "@wikipedia" from being registered making the whole feature almost useless and forcing me to invent workarounds to things that should be VERY simple in a browser. Any ideas how to fix this?

Dear Sir or Madam,

I'm running 101.0.1 and spell check no longer works on any mail app like Gmail, Outlook, Yahoo, BT Mail. If I use Chrome or Edge then spell check works correctly. This is despite my Firefox Settings being as below.....

Language Choose the languages used to display menus, messages, and notifications from Firefox. ENGLISH GB Set Alternatives… ENGLISH GB Choose your preferred language for displaying pages. Choose… ENGLISH (United Kingdom) (en-gb) Check your spelling as you type = Tick (Yes)

Could you please advise a fix?

Kind regards,

Neil.

P.S. If I use Chrome or Edge then spell check works correctly.

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

PlacesToolbarItems > .bookmark-item[container][label="Complete Tasks" i] {fill: #FF0000 !important;} PlacesToolbarItems > .bookmark-item[container][label="Medical Coding" i] {fill: #FF0000 !important;} PlacesToolbarItems > .bookmark-item[container][label="Bodybuilding" i] {fill: #FF0000 !important;}

This isn't that important, but I was just experimenting to see if changing a few folder colors would be of any benefit to me. And the above code that I tried didn't work. I'm guessing that something changed with Mozilla Firefox in the last 1-1.5 years, and I have a feeling that if I dig into https://developer.mozilla.org/en-US/docs/Web/CSS/Attribute_selectors for hours or even days I won't be able to figure out what I need to change. Anyone know what the new code should be? Thanks in advance.

I have the Startup checked, to Open previous windows and tabs, but when I close Firefox, all tabs are closed. I have "Remember history" selected under History. Under "Cookies and Site Data" the box that says, "Delete cookies and site data when Firefox is closed" is unchecked. See uploaded images.

I am in the USA. Every time, on any page or website that I need to provide credit card info, when I click in the box to type in the CC numbers/expiration date/CCV, a window pops up as it should (for auto-fill) with my credit card information. In that window, I can scroll over the different credit cards, click on the one I want to use, and it SHOULD auto-fill into the box where the numbers would normally be typed in. Now, the window still pops up and I can scroll over the credit cards and choose one, but when I click on any of the particular credit cards, the auto-fill doesn't work. The boxes in "settings" are checked to allow auto-fill. It worked for months, then just stopped. Thanks for your assistance!

I need to disable this horrible translator that is now showing up on top of every page I visit, It keeps showing up even after choosing a translation or disabling translations for that language. That is probably a bug, but I don't want to wait for a fix, I need to be able to see the pages I visit completely, this thing prevents me from clicking buttons and and is really anoying.

This is the built-in translation feature since I do not use any translation plugins, and started showing up after an upgrade.

One time, when using MAC I accidentally set a website to always open in a different container. Now any time I attempt to launch this website, I receive the MAC prompt "Open this site in your assigned container?", where I have two options: Open in Current Container and Open in Assigned Container. There is also a checkbox labeled "Remember my decision for this site", however even if I tick this checkbox and select Open in Current Container, I still get this same prompt every subsequent time I visit this website.

Obviously people have asked this before, but those threads all seem to be closed now. The idea that a browser would not want to have a consistent UI with every other part of the operating system is absolutely nuts, so why is it not easier (or even automatic?!) to place the 'close tab' button on the left when running on a Mac operating system?

I have tried the solutions recommended here – https://support.mozilla.org/en-US/questions/1253751 – but without any success. Maybe someone could help me understand what I am doing wrong? Better yet, maybe Mozilla could remove the need for such workarounds and implement what ought to be a standard feature?

In my opinion, App Mode is a very useful feature that allows installing a website as an app. However, I am unable to see any option related to App Mode in 95.0.2 (64-bit). Could you please help me about this issue?

Could you add a option of closing tab with <kbd>Ctrl</kbd>+<kbd>w</kbd> to the advanced preference?

Also, I realized that:

```browser.tabs.warnOnClose False``` Does this option activates warn when closing the tab? If your answer is yes, it is not working at all.

Before update when I clicked in PDF viewer toolbar download button it opened a screen to open with, right now it only download a file. I want it back. I have firefox as pdf viewer, but sometimes I need to open file with Acrobat DC, that's when I did click download button. It works on other computer like before, it is before firefox update.

I work on kubuntu 20.04 with plasma 5.18.8 desktop environment. I have a QtCurve-based custom application style, which I almost match with css for GTK apps. Firefox has to be an exception by itself! Not only that, but it changes my ability to customize its interface, from time to time and even changes access to such ability, on some updates.

My scrollbar customizations in userChrome.css and userContent.css do not work any more (other CSS changes still work, for menu/addressbar/tabbar/bookmarksbar orderint and tab styling). I had to resort to settings in user.js file, to get a 20px width scrollbar, suitable for my big screen, but... it gets very wide when I increase the focus, on some webpages and becomes very ugly! Furthermore, I cannot make sense of the proper use of "ui.themedScrollbar*" settings and the scrollbar and its slider result in the same color. These are my settings in user.js:

user_pref("widget.content.gtk-theme-override", "backwater"); user_pref("widget.non-native-theme.enabled", false); // Use GTK-3.0 gtk.css: set to false user_pref("toolkit.legacyUserProfileCustomizations.stylesheets", true); // Use userChrome.css & userContent.css: set to true user_pref("widget.gtk.alt-theme.scrollbar_active", true); user_pref("widget.non-native-theme.scrollbar.size.override", 20); // If nothing else works, fix scrollbar width to 20px user_pref("widget.non-native-theme.gtk.scrollbar.round-thumb", false); user_pref("widget.non-native-theme.gtk.scrollbar.thumb-size", 1.0); // originally 0.75 user_pref("widget.non-native-theme.gtk.scrollbar.allow-buttons", true); // it was true, anyway... user_pref("layout.css.cached-scrollbar-styles.enabled", false); user_pref("layout.css.color-mix.enabled", true); user_pref("widget.non-native-theme.scrollbar.style", 4); // wide scrollbar theme: set to 4 user_pref("ui.themedScrollbar", "#bad1f5"); user_pref("ui.themedScrollbarInactive", "#668cc4"); user_pref("ui.themedScrollbarThumb", "#e4e4e4"); user_pref("ui.themedScrollbarThumbHover", "#e4e4e4"); user_pref("ui.themedScrollbarThumbActive", "#668cc4"); user_pref("ui.themedScrollbarThumbInactive", "#bad1f5"); user_pref("browser.dom.window.dump.enabled", false); user_pref("extensions.ui.sitepermission.hidden", false); user_pref("fission.experiment.max-origins.qualified", true);

Either with the "ui.themedScrollbar*" settings or without them (and cleared from the prefs.js file), the scrollbar and its slider result in the same color, unless I (tryingly) click on some place on the scrollbar outside its slider; then I can see the slider, _only_ for the duration of the mouse-down event (which causes up or down page-hight scrolling).

The default, very thin scrollbar, as well as my modified wide scrollbar with invisible slider are both useless to me! I have even tried fx-autoconfig (https://github.com/MrOtherGuy/fx-autoconfig) to make the scrollbar CSS work, but no result. At this point, I am considering switching to another browser, despite the trust I have to mozilla, for my data and privacy.

Hello! I am using the userChrome.css file to hide the nav bar (# nav-bar) and show it when hovering the tabs.

The following code works a bit, but when I open the developer tools they overlap.

# nav-bar {
   z-index: -1;
}

# navigator-toolbox: hover # nav-bar {
   z-index: 1;
   background-color: rgba (0,0,0,0.8)! important;
}

#browser {
   margin-top: -45px;
}

Any advice to achieve the expected functionality? Thank you

gif showing the problem: https://s10.gifyu.com/images/firefox-customization-problem.gif

Firefox does not print the right edge of web pages that are made in landscape mode.

I set FF to "Fit to page width" but it does not print the right edge. It's cut off.

And there is no Orientation option available. Not sure if that has any significance because it supposed to "Fit to page width" anyway.

What's the work around to fix this?

Hello. Before the "proton" update to the Firefox UI, I had nicely saved space in my browser by putting the navbar up on the same level with the menu bar which is able to make the UI area of Firefox take up less vertical space on my screen. Proton broke this however, so I reverted.

What sort of userchrome.css code do I now need to use in order to put the menu bar and navbar on the same level, like the attached image?