Diễn đàn hỗ trợ Firefox

Today (06/12/2025) upon opening a new tab, Firefox slid the new option of uploading a custom picture to apply to the background. Tried the new feature, now I can not find the setting that allows me to change the picture. I read the thread "Customize your wallpapers". The instructions are as follows; You can personalize your Firefox New Tab page by adding one of the available wallpapers. Follow these steps:

  1. In the right corner of the New Tab page, click the gear IG settings icon.
  2. In the customization panel, under the Wallpapers section, you will see different categories like Solid colors, Abstract and Photographs.

       Click the category you prefer. For example, selecting Abstract will show a variety of abstract designs. 

The problem I have is the customization panel is no where to be seen, I have click on EVERYTHING possible, it is not in my settings, why? How do find this?

I'm having some trouble with automatic translations on firefox. I don't know if It's exclusive of firefox, but some websites, mostly wikis, open a "translate" field that automatically creates a new website, wich causes the images and some other stuff on the website to break. I tried disabling the translation on about:config off, as show in some other questions, but it did not work. This is being really annoying because it keeps breaking websites unless i get to the original link.

I have the box ticked in Settings for previous tabs to be installed on Startup but it isn't happening although it used to. I was trying to get rid of caches (what are they?) and must have done something.

Firefox 139.0.1 (64-bit) on Windows 11

I occasionally increase the zoom level of websites (usually forums) with Ctrl+mouse wheel if the default text size is too small. However, if I forget to set them back to 100% (Ctrl+0) before closing the tab, the next time I open that URL, it's at the former adjusted zoom level -- not 100%. Really annoying.

How do I force Firefox to open all URLs at 100% regardless of the last custom zoom level? I have default zoom already set to 100% in Settings and Zoom Text Only is not enabled.

Thanks.

Dear Firefox team, I have one question only.

ARE YOU FUCKING INSANE? Can you STOP bombarding me with the notifications? This is MY DESKTOP, this is MY PC, I DON'T NEED this shit.

For anyone who would like to help:

No, there's no such option in settings. No, removing updater physically does not stop pop-ups. No, there's nothing in about:config to shut up the updates.

For Firefox team:

No, your updates ruin the browser, more and more, I think I'm about to switch to Pale Moon instead.

How to disable the Enterprise Roots preference-have tried everything I can find on this issue. In summary, deleting certificate via reg edit but this does not work, have to delete certificate every time I re start windows 11 desk top pc.

Any other advice? Thanks

After the 139.0 update, I noticed 'Firefox Labs' is missing on my settings page. I checked the config and saw: browser.preferences.experimental true

I have telemetry checked Send technical and interaction data to Mozilla This helps us improve Firefox features, performance, and stability. Learn more

Once in a while the 'Firefox Labs' will appear momentarily then disappear.

Any ideas son why this is happening?

(Sorry if the wrong area.)

I'm curious and play with Node-Red a lot.

Just now I am playing with the `http-request` to explore web pages.

I press the `F12` key and the tools pop up and I go through some basic things.

I see/get just about nothing. See pic (Don't know to make it inline.) But the name says it all.

So I've pressed the `F12` key, clicked on the NETWORK and REFRESHED the page.

Now with Chrome.

Whole different set of stuff.

Someone - please. What's going on? I'm not understanding the huge difference with how things are shown.

Can I Manual Remove/Disable those pin Marker on Homepage ? I know it is usable to know what page we have pinned, But i want some change to prefer good looks for this. Just personal eyelooks. Thank You

I have some code in my .css file that had restored colored folders, a la pre version 89 AFAIR, for the folders on the bookmarks toolbar and in the bookmarks menus off the toolbar. It was working in V138.

I just upgraded to V139 and it's no longer working. I have the plain black/white wireframes back for the toolbar folders on the bookmarks menus.

The code I was using is below. I didn't write it and I confess that I only marginally understand it.

Can someone help me to regaining the colored folders? The white ones are a serious visual impairment for my brain. I need them to be more distinct from the menus themselves.

/*

 Colored folders for Bookmarks Menus, Bookmarks Sidebar, Bookmarks Toolbar, Library window, Add/Edit Bookmarks dialog
 Substitutes a Firefox 57-style folder icon for the new wireframe folder icon

• /

/* Standard folder -- on Toolbar and Menus */

1. PlacesToolbarItems toolbarbutton[container="true"]:not([query="true"]) .toolbarbutton-icon,

-moz-any(

1. PlacesToolbarItems,
2. PlacesChevronPopup,
3. BMB_bookmarksPopup,
4. bookmarksMenu,
5. OtherBookmarksPopup) menu[container="true"]:not([query="true"]) > .menu-iconic-left > .menu-iconic-icon,

/* Standard folder -- in Sidebar, Library, Add/Edit Bookmark dialog */

-moz-any(

1. bookmarks-view,
2. editBMPanel_folderTree,
3. placesList,
4. placeContent) treechildren::-moz-tree-image(container),
5. editBMPanel_folderMenuList > .menulist-label-box > .menulist-icon,
6. editBMPanel_folderMenuList menupopup menuitem,
7. editBMPanel_folderMenuList {

 fill: #e8bb00 !important; /* slightly muted gold */
 /* Specify icon for Firefox 89 Proton (base 64 conversion from old SVG with gold color) */
 list-style-image: url("data:image/svg+xml;base64,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") !important;

}

/* Smart bookmark folder -- on Toolbar and Menus */

1. PlacesToolbarItems toolbarbutton[container="true"][query="true"] .toolbarbutton-icon,

-moz-any(

1. PlacesToolbarItems,
2. PlacesChevronPopup,
3. BMB_bookmarksPopup,
4. bookmarksMenu,
5. OtherBookmarksPopup) menu[container="true"][query="true"] > .menu-iconic-left > .menu-iconic-icon,

/* Smart bookmark folder -- in Sidebar, Library, Add/Edit Bookmark dialog */

-moz-any(

1. bookmarks-view,
2. editBMPanel_folderTree,
3. placesList,
4. placeContent) treechildren::-moz-tree-image(container, query) {

 /* Specify icon for Firefox 89 Proton to override basic folder */
 list-style-image: url("chrome://browser/skin/places/folder-smart.svg") !important;
 fill: #69c !important; /* similar to blue smart folder color */

}

/*** Top-level "container" icons (otherwise would be Standard folder color) ***/ /* Bookmarks Menu -- in Sidebar, Library, Add/Edit Bookmark dialog */

-moz-any(

1. bookmarks-view,
2. editBMPanel_folderTree,
3. placesList,
4. placeContent) treechildren::-moz-tree-image(container, OrganizerQuery_BookmarksMenu),

-moz-any(

1. bookmarks-view,
2. editBMPanel_folderTree,
3. placesList,
4. placeContent) treechildren::-moz-tree-image(container, queryFolder_menu________),
5. editBMPanel_bmRootItem > .menu-iconic-left,
6. editBMPanel_folderMenuList[selectedIndex="1"] > .menulist-label-box > .menulist-icon,
7. editBMPanel_folderMenuList[selectedGuid="menu________"] {

 /* Specify icon for Firefox 89 Proton to override basic folder */
 list-style-image: url("chrome://browser/skin/places/bookmarksMenu.svg") !important;
 fill: olive !important;

}

/* Bookmarks Toolbar -- on Menus */

1. BMB_bookmarksPopup #BMB_bookmarksToolbar > .menu-iconic-left > .menu-iconic-icon,
2. bookmarksMenuPopup #bookmarksToolbarFolderMenu > .menu-iconic-left > .menu-iconic-icon,

/* Bookmarks Toolbar -- in Sidebar, Library, Add/Edit Bookmark dialog */

-moz-any(

1. bookmarks-view,
2. editBMPanel_folderTree,
3. placesList,
4. placeContent) treechildren::-moz-tree-image(container, OrganizerQuery_BookmarksToolbar),

-moz-any(

1. bookmarks-view,
2. editBMPanel_folderTree,
3. placesList,
4. placeContent) treechildren::-moz-tree-image(container, queryFolder_toolbar_____),
5. editBMPanel_toolbarFolderItem > .menu-iconic-left,
6. editBMPanel_folderMenuList[selectedIndex="0"] > .menulist-label-box > .menulist-icon,
7. editBMPanel_folderMenuList[selectedGuid="toolbar_____"] {

 /* Specify icon for Firefox 89 Proton to override basic folder */
 list-style-image: url("chrome://browser/skin/places/bookmarksToolbar.svg") !important;
 fill: olive !important;

}

/* Other Bookmarks -- on Menus */

1. BMB_bookmarksPopup #BMB_unsortedBookmarks > .menu-iconic-left > .menu-iconic-icon,
2. bookmarksMenuPopup #menu_unsortedBookmarks > .menu-iconic-left > .menu-iconic-icon,

/* Other Bookmarks -- in Sidebar, Library, Add/Edit Bookmark dialog */

-moz-any(

1. bookmarks-view,
2. editBMPanel_folderTree,
3. placesList,
4. placeContent) treechildren::-moz-tree-image(container, OrganizerQuery_UnfiledBookmarks),

-moz-any(

1. bookmarks-view,
2. editBMPanel_folderTree,
3. placesList,
4. placeContent) treechildren::-moz-tree-image(container, queryFolder_unfiled_____),
5. editBMPanel_unfiledRootItem > .menu-iconic-left,
6. editBMPanel_folderMenuList[selectedIndex="2"] > .menulist-label-box > .menulist-icon,
7. editBMPanel_folderMenuList[selectedGuid="unfiled_____"],
8. OtherBookmarksPopup + .toolbarbutton-icon {

 /* Specify icon for Firefox 89 Proton (base 64 conversion from old SVG with olive color) */
 list-style-image: url("data:image/svg+xml;base64,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") !important;

}

/* (Older Firefox) Avoid overriding classic Bookmarks Toolbar and Other Bookmarks icons in menus */

1. BMB_bookmarksPopup #BMB_bookmarksToolbar.menu-iconic-icon,
2. bookmarksMenu #bookmarksToolbarFolderMenu.menu-iconic-icon {

 list-style-image: url("chrome://browser/skin/places/bookmarksToolbar.png") !important;

}

1. BMB_bookmarksPopup #BMB_unsortedBookmarks.menu-iconic-icon,
2. bookmarksMenu #menu_unsortedBookmarks.menu-iconic-icon {

 /* Specify icon for Firefox 89 Proton (base 64 conversion from old SVG with olive color) */
 list-style-image: url("data:image/svg+xml;base64,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") !important;

}

In the article https://support.mozilla.org/en-US/kb/install-firefox-linux#w_install-firefox-deb-package-for-debian-based-distributions-recommended

https://packages.mozilla.org/apt leads to 404, not a Debian software repository / archive.

Step 4 (is broken)

Next, add the Mozilla APT repository to your sources list:

echo "deb [signed-by=/etc/apt/keyrings/packages.mozilla.org.asc] https://packages.mozilla.org/apt mozilla main" | sudo tee -a /etc/apt/sources.list.d/mozilla.list > /dev/null

I prefer the tabs be below the bookmark bar, and successfully modified the CSS file to do this some time back. Now update 133 has once again pushed them up below the menu bar. What do I have to do to get them back where I want them this time? And why can't you just leave the tab location preference alone when doing updates?

Hi. There is a new feature of Firefox that bothers me. It is when I drag tabs around the top, they try to group when I don't want them to. So I go to about:config and find the "browser.tabs.groups.enabled" key and set it to false. But when I restart Firefox, the change reverts. How do I fix this so the change stays?

I've already tried going to Menu->Help->More troubleshooting information->Profile Folder->Open folder, but there is no "user.js" file there. Do I have to do a Firefox reset to fix this? I hope not...

Note that I'm pretty sure that other settings that I change do not revert when I restart Firefox. Right now, it seems to be just this one about:config setting, unless the new version of Firefox reverts all manually changed about:config settings upon restart.

Thanx in advance for any help.

I have tried MANY times to make Firefox remain persistent as my browser. It appears I should log into an Administrative account to do so. Microsoft Edge appears to be the problem by remaining the default. I was told by the Tech Sprt for my Asus laptop to "delete" Edge. I entered the Administrative account using DOS. So many changes have taken place since I last used this account that I'm uncomfortable trying to take this approach. I was led to an administrative directory using "search" end while there was able to get a directory listing using DOS. But can't proceed. I really need the Windows pictorial version to proceed or technical support (preferred). Whoever helps must be fully capable.

Asus TS said I must delete MS Edge. The person seemed capable, but if I delete Edge, which I haven't found a way to do so safely, that may create problems but makes sense to do so because of the interference of MS Edge. My memory on how to proceed is that this process was MUCH less complex. I've read a number accounts by others with the same problem. My reasons for using Firefox, as an private engineer are to help prevent the stealing of intellectual property from wherever. Otherwise I'll have to abandon everything.