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[all variants] Firefox fails to determine filetype

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http://ubuntuforums.org – When I click a link in Firefox that leads to a file, the MIME type of the file seems to be read to determine which application is more suitable to open the file. Occasionally servers send out wrong mime type and Firefox defaults to the text editor, without making any further attempts to identify the file type. So I have to change the path to the correct application every single time (even if I try to open the exact same file again). My question is: Is it possible to make Firefox use some more sophisticated way to determine the filetype - e g check the file extension as fallback? It's usuall (Hardware)

xskl's picture
Submitted by xskl on 02/04/2013

Stories similar to [all variants] Firefox fails to determine filetype

file control with mime-type 18 weeks 3 hours ago

I have a security question regarding the mime types.

I have a website on which users can upload videos. Prior to encoding with ffmpeg, I make a mime-type check to be sure the video file is really a video file and not a weird file or even an exec with a video file extension.

Nevertheless sometimes, mime-type aren't recognized, especially with mkv containers.

Wow, that was a quick answer, thx alot for that! Due to procrastination reasons, I'll reply equally fast Xyne wrote:@jakobThe '--prefer' option requires a MIME-type matcher. See 'mimeo --mimeman-help' for the syntax. You need to tell it exactly which MIME-types to preferentially associate with dwb.

Firefox determines which program to use to open a download based on the download's MIME type. More information on that can be found in Mozilla's online documentation.

It seems to me that when Firefox encounters a MIME type it has no configuration for, it prompts the user to open it in Gedit. Why Gedit? How can I change the default for unrecognised MIME types to gnome-open?

We have a VPS server that we host our websites on. I have written a CMS using CodeIgniter. On one of the interfaces, I am attempting to upload a css file to the system. This worked correctly when we had it hosted on shared hosting.

Not even sure how I found the reason: mime type of *.r files (plain text R scripts) got set to "application/x-extension-r". (by ~/.local/share/mime/packages/user-extension-r.xml) . I checked update logs but couldn't determine the origin of this file. Interestingly, that happened only on one of two similar installations with the same 64bit Fedora 11.

I am new to Apache. I have almost no knowledge of apache. I am using apache 2.2.11. I have one css file and multiple .js files which i am uploading to a remote storage with a php page(PHP - 5.2.8). When i am using function mime_content_type to get the mime type of css.css file, i am getting text/plain. Same issue with .js files.

I edited my /usr/share/mime/packages/freedesktop.org.xml (with a text editor) to modify the file icon of application/x-7z-compressed mime type :

<mime-type type="application/x-7z-compressed"> <generic-icon name="package-x-generic"/>

I would like to know if there is a tool to edit this file (or to change the icon of a mime type) instead of using a text editor ?

I am looking for a way to determine file types in a folder with thousands of files. File names do not reveal much and have no extension but are different types. Specifically I am trying to determine if a file is a sqlite database.

When using 'file' command, it determines type of 2-3 files in a second.

How to open in Firefox? 2 years 19 weeks ago

Occasionally I will get some text file that causes Firefox to prompt me to download or open in some program. Instead, I want Firefox to display the file (it is a text file). How can this be done ... or why did they leave that ability out?

Example: http://connie.slackware.com/~alien/t...are-current.sh