Firefox Community Forum

My page throws errors in Firefox Nightly such as

Expected color but found ‘undefined’. Error in parsing value for ‘background-color’. Declaration dropped. preview.htm:1:1

and

Expected color but found ‘undefined’. Error in parsing value for ‘color’. Declaration dropped. preview.htm:1:1

The page references ten CSS files besides having dozens of its own CSS declarations. The issue is tha the reference provided to the error (:1:1) does not indicate where I can find the error. That is, I don't know which declaration is at fault. Is there some straighforward way to find the declaration in question?

After updating to v 133.0, when maximizing Firefox (not F11 fullscreen), a taskbar that is set to "auto-hide" will no longer unhide when mousing to the bottom of the screen. This did not occur with the previous version (132.0.2).

This behavior is also unaffected by the "devtools.toolbox.alwaysOnTop" setting in about:config as i've tried switching from the default "true" to "false".

Firefox on my 2018 MacBook Pro started having issues downloading all file types after I disconnected Dropbox sync and backup. Each time I try to download a file, a failed message is displayed below the file name and type. The browser was using the downloads folder that was synced with Dropbox. After disconnecting Dropbox, I tried changing the downloads location, but the "Choose" button does not display a window. The result is the same whether the Always ask you where to save files is checked or not.

I have gone through the following steps trying to resolve this issue with no success.

1. I have reset/cleared any configuration setting found using about:config and browser.download.
2. I have launched Firefox in troubleshoot mode and tested downloads with no resolution.
3. I have uninstalled Firefox and installed a fresh copy from mozilla.org with no resolution.
4. I have set the downloads folder in Safari, but this did not provide a resolution. Downloads work as expected in Brave and Safari. The current downloads location is the Downloads directory on my iCloud Drive.

The second screenshot with the error attached in still referencing the Dropbox-connected Downloads folder. No other browsers are using this folder and the Dropbox app has been completely removed from my laptop.

I use Firefox for web development and need to be able to download various files throughout the day, so this has become very frustrating.

Any help is greatly appreciated.

Cheers,

During normal use, my Firefox looks... normal. See first attached image. But when I start typing in the address bar, everything but the address bar disappears. See second attached image. Is this behavior intentional? If so, which version introduced this behavior? And how do I disable it?

How do I remove the sidebar permanently. It is now as I said above about 2.5cm wide and growing! I want it gone and none of the solutions give any idea how to do this. The show/hide button only made the damn thing expand!

after reinstalling my system i culd not login to my account i have like 9 passwords and your stopid system blecked my attempts like after second attepmt so i did password recovery and changed it but after that all my sync data are gon WTF!!!!! It makes the sync function pointless and usless for its specially for that purpose !!!!!!!

I'm not sure what type of issue this is, so hopefully I’ve posted it in the right place!

Devices:

• Firefox version 133.0 on 2022 M2 MacBook Pro OS Sequoia 15.1.1
• Firefox version 133.0 on iPhone 16 Pro Max iOS 18.1.1 (*for reference, of checking issue, not where issue is occurring)

Issue Breakdown: While updating my bookmark's tags in Bookmark Manager, my tags all but disappeared and other strange things started happening.

• My tags aren't in the sidebar menu of the Bookmark Manager at all. See Screenshot 1.
• Already tagged bookmarks retained the tags, but I’m unable to edit, add, or remove bookmark tags at all. When the bookmark is selected, the bookmark’s tags, nor any other tags, appear in a list under the bookmarks tags. See Screenshot 2.
• I can locate all bookmarks with the same tag by searching bookmarks in the Bookmark Manager.
• I can move and rename pre-existing bookmarks.
• I can add new bookmarks (confirmed by the blue star beside the address bar on the main browser after exiting and re-entering), but I cannot find those bookmarks anywhere in Bookmark Manager.
• My mobile bookmarks folder isn’t shown in Bookmarks Manager, but I can view 11 bookmarks in my Mobile Bookmarks folder on my phone’s Firefox application.

I’ve tried the following:

• restarting Firefox by quitting the application
• refreshing Firefox through the browser [https://support.mozilla.org/en-US/kb/refresh-firefox-reset-add-ons-and-se...]
• restarting my computer
• clearing the startup cache
• clearing the cache [https://support.mozilla.org/en-US/kb/how-clear-firefox-cache|link]
• restarted in Troubleshoot Mode [https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubl...]
• uninstalling then reinstalling Firefox software

I have no idea what is wrong with it or what is going on. What else can I do?

Hi,

I cannot seem to close a tab, usually the last one I opened, in my browser window. It remains at the upper left hand corner of the browser. Please note the tab in the attached image.

How do I close this window and prevent this behavior again?

Many thanks,

Lisa D

When right-clicking, neither Languages nor Check Spelling is displayed in the context menu. The language pack and dictionary are activated. In the settings, the checkbox for "Check spelling as you type" is selected, and the current Firefox version (133) is in use. However, no spell check is performed. I don’t know how to adjust the settings so that the options are visible and selectable in the context menu. I would appreciate your help. Thanks so much!

Is there any uptodate way of getting Firefox to use the Gnome keyring on Linux to store passwords. I have seen a number of very old solutions but none of them work for me. Thanks

I'm using Firefox 133 (64 bit) and just recently the down arrow on the right hand side is missing. I still have the up arrow. How do i get the down arrow back.

Thx for your help in advance.

Login to o365 email does not work on Firefox browsers after enabling the Conditional Access policy based on compatible devices

Firefox does not send device details, resulting in a device incompatibility message

Does Firefox support this?

There is an example of missing device ID in the attachment

My laptop (a Lenovo Ideapad220s) did an automatic Windows 11 update (I believe it was the 2H24 update). After that Firefox (version 133, 64 bit) would only open with the message "Gah. Your tab just crashed". Nothing I tried has worked, not any of the remedies found in support pages. I somehow did a Firefox software update and it shows as a separate icon and has not migrated any of the passwords and bookmarks I had in the software version that keeps crashing (my default browser). Trying to get access to the encrypted passwords to the many sites I've got with Firefox I opened the browser in troubleshooting mode. In this mode I have access to all the passwords saved over time, and the browser seems to work fine.

Any suggestions on what I need to fix or if this is related to the Windows update? I'd like not to have to go through the two-step process to use the browser.

Thanks!

I keep getting pop-ups in the right lower corner from "mozilla firefox" (not sure if they are legit). They will say: "zeus.2020 trojan detected" or "virus detected" or "system is infected", etc. All have "Mozilla Firefox" in the upper left of the pop-up, and "via rgfirewall.xyz" at the bottom. Is this truly legit, or is it just a nuisance? I've just been closing them with the x or dismiss buttons.

Is it possible to bookmark a particular section of a page, whereas the bookmark will take you to that location?

Textmarker was suggested in another thread, but apparently it is no longer working.

My Firefox on windows 10 crashes tabs OFTEN. Mostly is seems to be Facebook and YouTube tabs, but other tabs will crash and this morning, the Firefox start page tab crashed. I've done "refreshes", I've uninstalled and deleted the folder and re-installed, I've checked the SSD for errors. Nothing appears in the event viewer. Is there some way to definitively figure what is causing this?

How do I get rid of these constant firebox pop ups that block tabs that I have open. it is EXTREMELY affecting my ability to use my laptop. I WANT TO KNOW HOW STOP THIS BS

bsky.app cookie continues to be loaded on computer even after I continually delete it, privacy set to strict and blocked under "managed exceptions, why is it being reloaded when I don't access the site. None of the sites I access are linked to it, only visited once and if this alternative to x continues to set cookies, how can I permanently block it, thought the exceptions list was supposed to keep blocking it. So far it's come back three times, I'll screenshot it next time and attach.

I am trying to move one tab from one window to another. It says I should be able to move it just by clicking on the tab and dragging it to the window I want to move it to. But, when I try this nothing happens, it won't move.

Want can I do to resolve this?

Thanks