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Firefox only offers seven filetypes for handling (open or save the file). How can I enter more, for example what to do with an xlsx file? I want Excel to open the file, not download it.

Upon startup, top email displayed is the 2nd email present in the inbox. If 1st email is one at top when leaving TB, next startup will show the 2nd email on top. You can then scroll up and see the top one. Likewise, if a new email come in, it also shows the one below that as the top one and must scroll up to see it. No emails are lost, just a display thing. Don't recall which version this started, but it didn't use to do this.

TB 115.11.0 (64-bit) Supernova, Windows 10 22h2

whenever I am filling out an online form that requires basic info, Firefox prompts the common info that I have input in the past via the Auto-fill feature. Whenever I click on the suggested information, a new settings tab opens and switches my screen view to that tab. This didn't happen prior to the most recent update and has made filling out various forms extremely tedious and frustrating.

I have a fresh install of firefox on a fresh install of windows 11. I am trying to login to my dropbox account and when I get to the MFA page the "Continue" button does nothing.

There are no add-ins installed in firefox and I tried it in safe mode as well. I turned off enhanced tracking protection. The site works fine in firefox on another machine. It works in other browsers on the same machine.

Dropbox support seems to be unwilling to help, they just told me to use a different browser.

We use a firewall that doesn't support the ZSTD standard yet so I need the ability to turn it off on the Firefox browser. I haven't figured out how to do that yet since the new version came out with support for it this week. (We have turned it off for Chrome based browsers already.) It tends to break a few of hte websites we are using.

Thanks.

Since last "update" of Firefox for Windows v126.0

I can no longer access Gmail

keep getting this Error code: PR_END_OF_FILE_ERROR

can access my Gmail account on my phone using Firefox for iOS but not the laptop, what changed with the Firefox 126 update? what am I missing?

So I been using Firefox forever until February when I noticed that all my saved passwords were not available and I had to sign on to my account every-time I brought my laptop up. I tried everything i could think off or read but nothing works. I do shutdown my computer using Glary but I have turn off all cleaning of Firefox. I want to go back to Firefox but can't seem to get past signing on every-time to my account to get full access. Any thoughts on what I need to do?

I found a file that has an IP address at the top of it. And the IP address is from China. recently my email address showed up on dark web. Do you think It could be connected. and is hack?

Nuance Dragon 15, my speech to text software, periodically opens a window and says restore privileges to the Dragon web extension for Firefox to improve performance. However, the fix it button is inactive and Firefox has never seemed to have heard of this web extension and denies all knowledge of it so the cycle continues. Has anyone else encountered this novel issue, please?

External request to provide email content and send automatically, such as HTTP GET or POST similar to restAPI to do stuff on thunderbirds application for automated tasks, like opening emails, send email.

Almost consistently every day and often multiple times a day, Firefox will freeze up, unable to load new tabs, and sometimes will display a message that the browser has updated and requires a restart. Upon restart (when fozen), I'm prompted to create a new profile because I'm using an 'older version of Firefox'. After creating a new profile, I'm able to update the browser and switch back to my original profile.

Although this is a relatively easy fix, Firefox requiring me to restart my browser without being able to do anything else is disruptive alone, but not even completing the auto updates, crashing, and requiring me to do a workaround just to keep using the browser is driving me back to a more stable browser.

I don't remember updates requiring a restart before, or maybe they didn't happen enough to cause issues in my workflow.

I have tried using the 'restore' feature in the uninstaller hoping that it might resolve the issue with no results, but I haven't found any reasonable other options with my searches online.

I am migrating from Thunderbird to Office 365. I have moved the email by putting the Gmail details into Office 365. However could you please advise how I can migrate Tasks , Calender and Contacts from Thunderbird to Office 365 without having to pay for an Mbox to pst conversion tool.

This is the error while trying to download Microsoft Office application "Office Timeline" "\??\C:\Program Files(x86)\Mozilla Firefox\firefox.exe." Cannot start or run due to incompatible with 64-bit version of Windows

I added my own shortcuts and deleted all the preset ones (Wikipedia, Twitter, Amazon etc). On deleting the last one of the default ones, the 'Add a shortcut' button has completely disappeared. Is there another way to create a shortcut?

I have Thunderbird installed on my laptop running Fedora 40 with Gnome on Wayland. I have two monitors with different resolutions.

The laptop monitor has a resolution of 1920x1080 whereas the external monitor has a resolution of 1360x768.

Thunderbird display fine on the main monitor, but when I move it to the external display, everything becomes huge and unusable.

I don't want to scale things in such a way that I have the opposite problem, that is things are way too small on the laptop monitor. Is there a way to have Thunderbird scale properly on the external monitor to have it maintain the right proportions on both monitors?