Firefox Community Forum

Hello! I am developing a web server, from which users can download large files. These files take a few seconds to generate, and cannot be generated ahead-of-time; only when a user requests them. The server therefore responds to such requests by first sending the HTTP response headers (without "Content-Length"), which can be written immediately, then generating the file, and sending the generated file as the response body.

In Chromium, this leads to the "Save As..." dialog appearing instantly, so the file can be generated & downloaded in the background while the user picks a location.

In Firefox (v132, linux x64), the "Save As..." dialog waits for the file to be generated before appearing, which is not user-friendly. During deeper testing, I discovered that Firefox appears to wait for my server to send at least 1 byte of data from the file (in the response body, after sending the HTTP response headers), before the "Save As..." dialog appears.

I have searched the Firefox settings and documentation but did not find anything that would explain this behavior. Is this a bug?

When I didn't know what I was doing, within Settings for Firefox desktop browser for Windows 10 where you can make associations for file types or applications, I began putting choices in that I felt made sense at the time. I don't think I've made the best choices and I would like to change that entire section with the heading Content Type to the defaults that would have appeared in the Action column. Is there a way I can return the defaults only for Content Type without resetting everything in the browser to the state it was first in before I began customizing some areas? Thanks.

Sehr geehrtes Firefox-Support-Team,

ich habe ein Problem, das sich bei der Verwendung von Firefox auf meinem Windows-PC ergibt. Wenn ich versuche, die Installations-EXE für Norton 360 von der Website norton.com herunterzuladen, startet der Download gar nicht. Es passiert einfach nichts, wenn ich auf den Download-Link klicke.

Ich habe bereits die folgenden Schritte zur Fehlerbehebung durchgeführt, jedoch ohne Erfolg:

   Cache und Cookies gelöscht

   Add-ons und Erweiterungen deaktiviert

   Firefox auf die neueste Version aktualisiert

Leider führt keiner dieser Schritte dazu, dass der Download startet.

Könnten Sie mir bitte weiterhelfen und eine Lösung für dieses Problem anbieten? Das gleiche Problem habe ich bei Bitdefender.com auch im Kunden Konto.

Ich danke Ihnen im Voraus für Ihre Unterstützung.

Mit freundlichen Grüßen

Yesterday all of my PDF documents were converted or changed to "Firefox HTML Documents". The change was made without my consent or action, after I yesterday used my laptop File dropdown menu to "export" and convert six new Word documents into six PDFs, which were saved on my Toshiba laptop and intended for uploading and filing with a governmental body. My Toshiba laptop runs Windows 10. This error and unauthorized action by Mozilla Firefox affects many dozens of PDF documents that I have created and saved over the last decade and causes me great inconvenience and harm.

How can I restore my PDFs to their correct form and format as PDFs, not "Firefox HTML Documents", which may not be uploadable or usable with court, government or other website portals?

How can I prevent Mozilla Firefox from making this unauthorized error and conversion of PDF document again?

Additional Edit of my question - After reading comments from numerous others that had the same problem of unauthorized change of PDFs to Firefox HTML Documents, I have the following additional question. How can we contact someone at Mozilla to make them stop their destructive highjacking of people's documents? I'm a lawyer, so in my world tampering with someone's document, that is required by law to be submitted as a PDF, can have serious real world consequences. I'm sure this is true of many other people's documents in many other fields and businesses. Who can we contact at Mozilla to insist that Mozilla's tampering with PDFs has to stop immediately? If Mozilla will not stop misappropriating control and tampering with documents, people should be compensated for any harm that Mozilla causes to such a large number of people.

When browsing I don't want to download files until I have looked at them. I have files opened in Acrobat and Firefox is downloading automatically even though 'Ask whether to open or download' is checked. So I end up having to go through the downloads folder and delete things I don't want to save (which is most).

Even though the custom folder for "downloads" has been set firefox keeps creating new one in the home folder. Nothing I've tried to do helped. From the bug reports I see this problem exists in the firefox at least for 15 years! I can't believe it is still not fixed. That's kind of behavior minor enough for the developers to take care of and major enough for the users to give up and switch browsers if it is not fixed. Crazy.