Cannot install any add-on in Firefox v4.0

What would cause an extension like NoScript to download fine in Firefox version 4.0 but then give a tiny green start of a progress bar on the installation and never continue? I even had multiple instances of extensions trying to install. No progress is ever made, and a restart shows no extension was installed. Duplicated issue on 2 WinXP Pro installations. Ended up doing a complete uninstall of Firefox (including all preferences/settings) and that resolved issue. What in the user settings would cause all installs to "hang"?

See if this works. Try downloading the .xpi file for the add-on, to do that right-click on the installation link and choose "Save link as". Then in the Firefox menus choose "File > Open File" and open the .xpi file that you downloaded. That should install the add-on.

Similar Messages

: I have recently purchased a iBook G4 Mac OS X VERSION 10.5.6 and I cannot install any apps such as firefox, adobe reader, it reads you cannot install this file on this disk

: I have recently purchased a iBook G4 Mac OS X VERSION 10.5.6 and I cannot install any apps such as firefox, adobe reader, it reads you cannot install this file on this disk

Are you saying the iBook G4 you have is running OS X 10.5.6?
The next file to get for it would be the Combo update 10.5.8 for Leopard.
And any old archived Flash player for 10.5.8 from Adobe flash site.
A browser such as TenFourFox, iCab, SeaMonkey-PPC, these are OK
but you won't be able to go past Leopard 10.5(.8) in a PowerPC Mac.
All these are free bits, however anything past 10.5.8 Mac OS X
would require a newer Mac with Intel-based architecture. Macs
made in 2006+ can see later OS X versions.
Good luck & happy computing!

Am not able to install any add-ons in Firefox 11 and the suggested fixes here don't seem to work. Any suggestions?

Installed Firefox 11 and no add-ons display. Tried to install Autofill Forms and I get the message "There was an error installing AutoFill Forms. Try Again" Same for any other add-on. Also running Norton 360V6 and can't even see Norton Toolbar. Have uninstalled and reinstalled both Firefox and 360 (the latter using Norton Removal Tool). Do not have this problem with Internet Explorer or with Firefox 11 on my other computers. Just this one. Plugins from an earlier version of Firefox show up, but not any Add-Ons.

Maybe try the [[Basic Troubleshooting]] article first?

I cannot install any add on. Download error -228

When I try to install an Add-On, I get the following message:
Firefox could not install the file at
because: Download error
-228
This happens with ANY Add-On download. Theme or Add-On.

See if this works. Try downloading the .xpi file for the add-on, to do that right-click on the installation link and choose "Save link as". Then in the Firefox menus choose "File > Open File" and open the .xpi file that you downloaded. That should install the add-on.

Facebook and Firefox does not recognise Firefox as my browser.Unable to install any add-ons from Firefox.

This all happened suddenly by itself. I did not install any new programs or software of any kind. I have Norton security software, but this has been installed on my PC for 6 months without any problems. I have uninstalled Firefox3.6,10. And reinstalled it, but it does not solve the problems.

The user agent string may have been modified, try resetting it as shown here - [[Websites or add-ons incorrectly report incompatible browser]]

PS CC 2014 : cannot install any add-on

Hi,
I have installed the latest version of everything. I launched the add-on browser from PS CC 2014 and acquired 2 add-ons : Photoshop CC Features and Photoshop Blending Modes. The CC Desktop application is running, I have signed in and synchronization is ON. Photoshop CC 2014 is not running. When I go to "View my add-ons" after acquiring both add-ons, I can only see Photoshop CC Features (1st bug). On the right, I have the Remove button which seems to imply that this add-on has been installed.
If I launch PS CC 2014 and go to Window | Extensions, the menu is grayed out (2nd bug - no extension installed). If I open Adobe Extension manager CC, there's no extension registered under Photoshop CC 2014 (3rd bug).
Same problem with any other add-on I may try to install.
It seems that the CC desktop app is not synchronizing anything. When I go to the Files tab in Creative Cloud and click on Open Folder, it is empty. Is there any way to force synchronization?
What's the difference between "acquired" and "installed" ?
Has this thing ever been tested ?
Thanks in advance.

Tried again and this time I got the following error:
code -411
Compatible CC app not found.
Solution: Install a compatible Adobe application before installing Add-ons.
Well, Photoshop CC 2014 not a compatible CC app ? I'm beginning to suspect that version 2014 has broken much more extensions than I first thought.

My firefox version is 3.6.12, however I cannot download any add-ons cause it says I am still using version 2, and it is the same for website such as youtube where it is always saying I am using a outdated browser. How do I solve this?

I keep updating my firefox whenever it prompts me to, and now I am using version 3.6.12, but I still cannot download any add-ons or have problem using youtube cause they still says I am using a older version of the browser.
But when I go Help > About Mozilla Firefox, I am sure I have the latest version and no more updates can be found.

You have or had an extension installed (MegaUpload toolbar) that has changed the user agent from Firefox/3.6.12 to Firefox/2.0.0.13
You can check the general.useragent prefs on the about:config page:
* general.useragent.extra.firefox Firefox/2.0.0.13 MEGAUPLOAD 1.0
You can open the about:config page via the location bar, just like you open a website. 
Filter: general.useragent 
If general.useragent prefs are bold (user set) then you can right-click that pref and choose Reset.
See [[Web sites or add-ons incorrectly report incompatible browser]] and [[Finding your Firefox version]] 
See also http://kb.mozillazine.org/Resetting_your_useragent_string_to_its_compiled-in_default
Your above posted system details show multiple Java Console extensions. 
You can uninstall (remove) the Java Console extensions and disable the Java Quick Starter extension, you do not need them to run Java applets.
See http://kb.mozillazine.org/Java#Multiple_Java_Console_extensions
See also http://www.java.com/en/download/help/quickstarter.xml - What is Java Quick Starter (JQS)? What is the benefit of running JQS? - 6.0
Disable the Java Quick Starter extension: Tools -> Addons -> Extensions
Control Panel -> Java -> Advanced tab -> Miscellaneous -> Java Quick Starter (disable)
You should update the [[Java]] plugin (Java Plug-in 1.6.0_12) to the latest version (6 U22).
*http://java.sun.com/javase/downloads/index.jsp (Java Platform: Download JRE)

Cannot install "plugin/extension name" because Firefox cannot modify the needed file. This is happening for any and every kind of plugin theme you could think of. This started when I upgraded to Firefox 11 just now.

I just upgraded to Firefox 11.0 (unwillingly) and I get the following whenever I try to install ANYTHING at all. Themes, add-ons...it doesn't matter, the result is the same.
"Cannot install "plugin name here" because Firefox cannot modify the needed file.
If the fix requires installing a plugin...well, that's not going to work obviously.
Anybody know how to fix this?

You shouldn't see such an error. 
That error usually indicates that an extension or dictionary needs to be unpacked to make it work.
Firefox 4 and later no longer unpacks an extension automatically, but renames the XPI file to the ID of the extension and copies that file to the extensions folder in the Firefox Profile Folder.
If an extension needs to be unpacked then there should be an unpack directive (<nowiki><em:unpack>true</em:unpack></nowiki>) in the install.rdf file of that extension
You can try to set the Boolean pref extensions.alwaysUnpack to true on the about:config page.
*http://kb.mozillazine.org/about:config
* https://developer.mozilla.org/En/Updating_extensions_for_Firefox_4.0#XPI_unpacking

I have updated my iphone 4s with ios6 and now im not able to connect to itunes store. I can open the apps store but cannot install any app? Anyone facing the same issue..

I have updated my iphone 4s with ios6 and now im not able to connect to itunes store. I can open the apps store but cannot install any app? Anyone facing the same issue..

I have a 4S and upgraded to iOS 6 last week without any issues.
Have you tried resetting your phone (hold the power and home buttons down together until the silver apple appears)?

Can't install any add-on if FF4.0.1

I have 2 versions of FF, latest 14.x and also 4.0.1 which I want to keep. I start both with different profiles using
path_to_firefox.exe -P profile_name -no-remote
With 14.x I have no problems, but can't install any add-on in 4.0.1 - I tried installing from web or from a .xpi file - in both cases the download progress bar fills to 100% and then stays there forever, without proceeding further.
Is there a way to manually install an add-on? By this I don't mean from .xpi file, but really manually - if I extract .xpi contents, where should I place the files, and which other files I have to modify to have an add-on working?
OS is XP sp3 pro 32-bit US-English
Thanks

http://kb.mozillazine.org/Unable_to_install_themes_or_extensions_-_Firefox

HT201263 I have an iPod Touch which I've had for almost 4 years, with 32 GB of memory. I am unable to update it, and consequently cannot install any newer apps. I am very disappointed that I spent a lot of $$; now Apple wants me to spend $$ again to get a

I have an iPod Touch which I've had for almost 4 years, with 32 GB of memory. I am unable to update it, and consequently cannot install any newer apps. I am very disappointed that I spent a lot of $$; now Apple wants me to spend $$ again to get a new one. As I mentioned, I am pretty upset. Does anyone know if there's a work around?

I suspect you have a 2G iPod. Those can only go to iOS 4.2.1.
Identifying iPod models
iPod touch (3rd generation)
iPod touch (3rd generation) features a 3.5-inch (diagonal) widescreen multi-touch display and 32 GB or 64 GB flash drive. You can browse the web with Safari and watch YouTube videos with Wi-Fi. You can also search, preview, and buy songs from the iTunes Wi-Fi Music Store on iPod touch.
The iPod touch (3rd generation) can be distinguished from iPod touch (2nd generation) by looking at the back of the device. In the text below the engraving, look for the model number. iPod touch (2nd generation) is model A1288, and iPod touch (3rd generation) is model A1318.

I can't install any add-ons in muse

I can't install any add-ons in muse or download the .mulib file to install it manually. Please, help. Also, it's pointless to download the .zxp file since Adobe Extension Manager does not support Muse. Any advice?

Create a new profile as a test to check if your current profile is causing the problems.
See:
* [https://support.mozilla.com/kb/Basic+Troubleshooting#w_8-make-a-new-profile Basic Troubleshooting: Make a new profile]
If that new profile works then you can transfer some files from the old profile to that new profile (be careful not to copy corrupted files)
See:
* http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

I tried the cloud muse app and now when I try to install any add on or template they install to the cloud instead of my regular lightroom 5.6 desktop app. How do I fix this?

I tried the cloud muse app and now when I try to install any add on or template they install to the cloud instead of my regular lightroom 5.6 desktop app. How do I fix this?

Please try to perform the steps mentioned on below links
Sign out, Sign in | Creative Cloud Desktop app
Sign in, activation, or connection errors | CS5.5 and later

I cannot open any new tabs in Firefox on my PC. I have Vista Home ppremium

I cannot open any new tabs in Firefox on my PC. How can I correct this

hello g.hill250, can you try to replicate this behaviour when you launch firefox in safe mode once? if not, maybe an addon is interfering here...
[[Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems]]

[SOLVED] Cannot install any package thru pacman

I cannot install any package thru pacman
when i try to install the package with pacman -S,
I started getting error when my sytem crashed and i have to forcefully switch off my laptop through power button
after that when i install anything from pacman i got following error:
[tan@ARCH ~]$ sudo pacman -S shotwell
Password:
warning: shotwell-0.9.3-1 is up to date -- reinstalling
resolving dependencies...
looking for inter-conflicts...
Targets (1): shotwell-0.9.3-1
Total Download Size: 0.00 MB
Total Installed Size: 9.12 MB
Proceed with installation? [Y/n] y
(1/1) checking package integrity [##########] 100%
(1/1) checking for file conflicts [##########] 100%
(1/1) upgrading shotwell [##########] 100%
ldconfig: File /usr/lib/libgexiv2.so.0.0.0 is empty, not checked.
ldconfig: File /usr/lib/libgexiv2.so.0 is empty, not checked.
ldconfig: File /usr/lib/libgexiv2.so is empty, not checked.
ldconfig: File /usr/lib/libraw.so is empty, not checked.
ldconfig: File /usr/lib/libraw.so.2 is empty, not checked.
ldconfig: File /usr/lib/libraw_r.so.2 is empty, not checked.
ldconfig: File /usr/lib/libraw.so.2.0.1 is empty, not checked.
ldconfig: File /usr/lib/libraw_r.so is empty, not checked.
ldconfig: File /usr/lib/libraw_r.so.2.0.1 is empty, not checked.
Thanks in advance
Last edited by tan (2011-05-29 05:45:28)

Thank God, everything is fixed now:
First, I deleted all these files, then i follows the following procedure
1. For libgexiv2 file i upgraded 'xorg-server, xorg-xinit, xorg-utils, xorg-server-utils' from pacman
# pacman -S xorg-server xorg-xinit xorg-utils xorg-server-utils
2. For libraw file i upgraded 'libraw' from pacman
# pacman -S libraw
There will be some conflicting files
After deleting some conflicting files it solves the problem and restore all the 'lib' file.

Cannot install any add-on in Firefox v4.0

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