Firefox doesn't pass vCalendar downloads to Outlook correctly.

Setup Firefox to associate .vcs files with Outlook (not save to file,) and download a calendar entry from a web site such as United.com. When you confirm the download, Outlook will start and display an "Invalid command line entered, please check your switches" error message.
Saving the vcs to a file and then using Windows to associate it with Outlook doesn't have this problem, and IE doesn't have this problem.

This can also happen if there are images on the page that do not have the dimensions specified.
A good place to ask advice about web development is at the MozillaZine "Web Development/Standards Evangelism" forum.
*http://forums.mozillazine.org/viewforum.php?f=25
The helpers at that forum are more knowledgeable about web development issues. 
You need to register at the MozillaZine forum site in order to post at that forum.

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Firefox doesn't represent parts of some pages correctly, or doesn't represent parts of some pages at all.

Firefox doesn't represent parts of some pages correctly, or doesn't represent parts of some pages at all. The page [http://osvajalec.si http://osvajalec.si] is not represented correctly. See screenshots: [http://yfrog.com/eumissingxtjx http://yfrog.com/eumissingxtjx] Deleting cookies, disabling Adblock & Noscript and restarting computer/browser didn't help. When I'm not logged in or if i log out, the missing part is not missing. IE is representing the page without problems. :/

You can try these steps in case of issues with web pages:
You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.
*Hold down the Shift key and left-click the Reload button
*Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
*Press "Command + Shift + R" (Mac)
Clear the cache and remove cookies only from websites that cause problems.
"Clear the Cache":
*Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"
"Remove Cookies" from sites causing problems:
*Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: "Show Cookies"
Start Firefox in [[Safe Mode|Safe Mode]] to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.
*Switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance
*Do NOT click the Reset button on the Safe Mode start window
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
You can open the Web Console (Firefox/Tools > Web Developer).
Check on the Network tab if any content is blocked and has a file size 0 (zero).
*https://developer.mozilla.org/Tools/Web_Console

Only latest Mac version of FireFox doesn't render images from certain websites correctly. How to fix?

Running FireFox 3.6.16 on both Windows 7 sp1 and Mac OS 10.6.7. When viewing the images on some websites, for example the home screen for www.xerox.com, the "slide show" images that come across the browser on the Mac have lines going through the images. These same images look fine on Windows 7 and when using other browsers, such as Safari, Explorer, etc too.

Hello mpunt74, try to [https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems#w_turn-off-hardware-acceleration turn off hardware acceleration], and check it again.
thank you

I downloaded Newest mozilla yesterday, adobe updated, and now when I click a YouTube video I get a box saying "Firefox doesn't know how to open this address, because the protocol (rtsp) isn't associated with any program." and can't watch any videos?

I downloaded the latest version of Mozilla Firefox yesterday, full and complete, and I am actually using it right now. The only problem I have had is upon clicking any YouTube video, the box pops up saying "Firefox doesn't know how to open this address, because the protocol (rtsp) isn't associated with any program." But there are no directions or suggestions on how to address this problem. Ive looked at YouTube add-ons and none of them really seem related. Upon the finish of the new Mozilla, I also was prompted to upgrade the flash player, and did so without any trouble. I am only guessing this is an extension/plug-in problem. I really am quite confused!

Clear the cache and the cookies from sites that cause problems.
"Clear the Cache":
* Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
"Remove Cookies" from sites causing problems:
* Tools > Options > Privacy > Cookies: "Show Cookies"

Why does the Download Firefox doesn't offer me a language choice iso immediately deciding I have to like downloading it in e.g. Dutch because I'm e.g. in Brussels-a cosmopolitan city?

Why does the Download Firefox doesn't offer me a language choice iso immediately deciding I have to like downloading it in e.g. Dutch because I'm e.g. in Brussels-a cosmopolitan city?
When going to firefox.com and clicking the download button, immediately I get directed to the dutch / Nederlands version of the site and I only get the choice to download Firefox Dutch/Nederlands.
I want the English version. Wouldn't it be better to ALSO have an option to select the language, wherever the software detects you're getting your internet connexion from?

As people posted, You can select whatever language you want instead at the [http://www.mozilla.org/en-US/firefox/all.html Systems & Languages] link below the download button. Or on https://www.mozilla.org/nl/firefox/fx/ it will be the [http://www.mozilla.com/nl/firefox/all.html Andere systemen en talen]

Firefox doesn't play video and audio, cann't download anything!

A very strange problem occurred a few days ago. I didn't pay attention on it at first ( I thought it was caused by my provider) but now I found that it's a real problem. Firefox doesn't play video or audio. For instance, it starts loading and that's all. The same is with playing music. In addition, I can't download any files and view a big image as quick as early.
What is more interesting sometimes Firefox just begins to work in ordinary way.

There is no single codec for movies that have .avi extensions. AVI is a container format, not a specific type of file. An AVI movie may use one of the Indeo codecs (there are at least four that I'm aware of, none of which have been ported to Mac OS X) or one of the various flavors of DivX, among other possibilities. You'll have to find out what codec was used for the movies you want to view to determine what you need. Note that not all codecs for the various .avi movies are available for QuickTime.
If you want to try "hit and miss", you can try the codecs at http://www.divx.com/ and http://www.3ivx.com/ and see if one of them will work for you. Perian, which rolls several codecs into one package, might also work.
If you just want to play the movie any way you can, you can also give this player a try:
http://www.videolan.org/vlc/
Forum Tip: Since you're new here, you've probably not discovered the Search feature available on every Discussions page, but next time, it might save you time (and everyone else from having to answer the same question multiple times) if you search a couple of ways for a topic, both in the relevant forums, in the User Tips Library and in the Apple Knowledge Base before you post a question.
Regards.

Unable to download music - error message reads "Firefox doesn't know how to open this address, because the protocol (wmms) isn't associated with any program."

I purchased a song to download from Walmart.com and received the error message when I tried to download the song; "Firefox doesn't know how to open this address, because the protocol (wmms) isn't associated with any program." I've never had a problem before. I paid for this download & I can't even access it.

Does the Walmart site offer a plugin or program (Walmart MP3 Music Downloads) to handle that protocol? 
See:
* http://mp3.walmart.com/store/help/help.htm
* http://mp3.walmart.com/store/help/downloading.htm
On Windows a protocol need to be registered by a program that supports that protocol.
See also http://kb.mozillazine.org/Register_protocol

How can I get Firefox to pass its downloads to Speed Download as all the other browsers do (it used to be able to do this)?

Until a few months ago All our browsers could automatically pass their downloads to "Speed Download" for downloading, very handy to have them all working in one place.
Now after recent updated in the last six months or so Firefox alone no longer does this but insists on using its own download setting.
how can I get it to respond to Speed Download as before, along with Google Chrome, Camino and Safari?

Have you tried the update to Fast Dial, version 4.2.1 or later? It should override the built-in new tab page: https://addons.mozilla.org/en-US/firefox/addon/fast-dial-5721/ ''(Note: I haven't tested it myself)''
If you are using a similar add-on that isn't the same "Fast Dial", which one is it?

My firefox doesn't show what I download in my computer before I push F5. How resolve this?

I have tried to instal many versions of firefox from 15 tot 23. But firefox doesn't show thw doc/image etc on my desktop (where I set to put my download). After i push F5 the doc/image appear on my desktop. what ti do? how to set? i look in all settings but...

Start Firefox in [[Safe Mode|Safe Mode]] to check if one of the extensions (Firefox/Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Firefox/Tools > Add-ons > Appearance).
*Do NOT click the Reset button on the Safe Mode start window or otherwise make changes.
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) as a test to see if that helps.

Downloads to Outlook Express mail from Google now (since Mozilla update) incomplete. ¿A Mozilla problem?

For years, download to Outlook Express of mail in three Gmail accounts worked fine.
New problem, not all of the mail at Google gets to Outlook, and what's missing disappears.
This problem appeared after recent Firefox update. Is this a possible cause?
I'm using Windows 7 Home Premium

It an Outlook Express thing Firefox has nothing to do with it. But after saying that, if you view your mail with a browser and then open Outlook Express, it will not see it as new mail and leave it on the server.
Also OE is really limited you should use Thunderbird mail
http://www.mozilla.org/en-US/thunderbird/
or something else.

HP Protect tool password manager not working with the new version of Mozilla: I got this alert: "Firefox doesn't know how to open this address, because the protocol (dpql) isn't associated with any program." please help

I have an HP ProBook 4520s. I have been using HP Protect tool's Password manager to store and manage my passords for all Login websites in Firefox 3.6. As a result, I just swiped my fingerprint to log on to any website.
After I installed the version 4 of Firefox, my all my login details do not work anymore. I have tried to reset them but I repeatedly get this error: "Firefox doesn't know how to open this address, because the protocol (dpql) isn't associated with any program."
something like this would have been passed onto the address: "dpql://c:\program%20files%20(x86)\hewlett-packard\hp%20protecttools%20security%20manager\bin\dpminionlineids.dll/qlinkload.htm#id=2".
Although the password manager works with Internet Explorer 9, I need it to work with Firefox 4 as this is my preferred browser.
Please help. Thank you!

I guess this means that IE is more user friendly for HP Password Manager finger swipe recall of passwords, a favorite of mine. I still don't see a post from Firefox as to why they haven't produced fix. So I'll switch to IE until things change. I don't see value in downgrading to a Firefox version that's no longer going to be supported.

When trying to stream video I am getting this error message "Firefox doesn't know how to open this address, because the protocol (st) isn't associated with any program." How do I fix this?

<blockquote>Locking duplicate thread. 
Please continue here: [/questions/782039]</blockquote> 
When trying to stream video I am getting this error message "Firefox doesn't know how to open this address, because the protocol (st) isn't associated with any program." How do I fix this?

Protocol error usually indicates that the very leftmost part of the URL is not recognized.
So http://, ftp://, rtsp://, usually work.
ableton:// would need to be added by some software somewhere...
Can you get instructions from the vendor? Does these posts seem relevant:
[http://forum.ableton.com/viewtopic.php?f=32&t=112368 Ableton Forum • View topic - [dds] Bug with Fireforx browser and downloading project?]
[http://forum.ableton.com/viewtopic.php?f=32&t=109918 Ableton Forum • View topic - [gck] Problem downloading shared sets from Ableton server.].

I try to email or IM a link or comment on a website page and I get this error message: Firefox doesn't know how to open this address, because the protocol (ymsgr) isn't associated with any program.

Firefox doesn't know how to open this address, because the protocol (ymsgr) isn't associated with any program. I try to email or IM a link or info on a web page I get this error message. How can I send an email or IM?

Protocol error usually indicates that the very leftmost part of the URL is not recognized.
So http://, ftp://, rtsp://, usually work.
ableton:// would need to be added by some software somewhere...
Can you get instructions from the vendor? Does these posts seem relevant:
[http://forum.ableton.com/viewtopic.php?f=32&t=112368 Ableton Forum • View topic - [dds] Bug with Fireforx browser and downloading project?]
[http://forum.ableton.com/viewtopic.php?f=32&t=109918 Ableton Forum • View topic - [gck] Problem downloading shared sets from Ableton server.].

Firefox doesn't know how to open this address, because the protocol (mf)

whan i try to download anything i got the msg: Firefox doesn't know how to open this address, because the protocol (mf)
any help pls?

Does this happen often, or just on one specific link? It sounds like the link on the web page is broken and contains "mf:" instead of "http:".
If it's a public website, can you post the address of the page containing the link? If not, you could try to report the problem if there is a feedback email address on the web page.

"firefox setup couldn't be downloaded"

I'm trying to reinstall but I keep getting "firefox setup couldn't be downloaded" doesn't say why. I just uninstalled, followed all of the directions but I can't reinstall. Can't download trouble shooter either.

''alex_mayorga [[#answer-665678|said]]''
<blockquote>
Certain Firefox problems can be solved by performing a ''Clean reinstall''. This means you remove Firefox program files and then reinstall Firefox. Please follow these steps:
'''Note:''' You might want to print these steps or view them in another browser.
#Download the latest Desktop version of Firefox from [https://www.mozilla.org mozilla.org] (or choose the download for your operating system and language from [https://www.mozilla.org/firefox/all/ this page]) and save the setup file to your computer.
#After the download finishes, close all Firefox windows (or open the Firefox menu [[Image:New Fx Menu]] and click the close button [[Image:Close 29]]).
#Delete the Firefox installation folder, which is located in one of these locations, by default:
#*'''Windows:'''
#**C:\Program Files\Mozilla Firefox
#**C:\Program Files (x86)\Mozilla Firefox
#*'''Mac:''' Delete Firefox from the Applications folder.
#*'''Linux:''' If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see [[Installing Firefox on Linux]]. If you downloaded and installed the binary package from the [http://www.mozilla.org/firefox#desktop Firefox download page], simply remove the folder ''firefox'' in your home directory.
#Now, go ahead and reinstall Firefox:
##Double-click the downloaded installation file and go through the steps of the installation wizard.
##Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.
More information about reinstalling Firefox can be found [[Troubleshoot and diagnose Firefox problems#w_5-reinstall-firefox|here]].
WARNING: Do not use a third party uninstaller as part of this process. Doing so could permanently delete your [[Profiles|Firefox profile]] data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and saved passwords. These cannot be easily recovered unless they have been backed up to an external device! See [[Back up and restore information in Firefox profiles]]. 
Please report back to say if this helped you!
Thank you.
</blockquote>

Firefox doesn't pass vCalendar downloads to Outlook correctly.

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