I can not install any addons as firefox throws an error saying " firefox can not modify the needed file"

whenever I try to install an addon, firefox says it can not install the addon since it can not modify the needed file! Whatever addon I have are from my previous version of firefox.

Is the date / time set correctly on that PC? <br />
Right-click the Time in the System Tray and select Adjust Date / Time to see.

Similar Messages

  • I keep getting the error "zotero could not be installed because firefox cannot modify the needed file". Any suggestions on how to fix this?

    After downloading Zotero (a plug in that is in theory custom-designed for firefox), I get an error message that says "zotero could not be installed because firefox could not modify the needed file". That's all the detail I have.

    You get this error if you install an extension that needs to be unpacked in order to work properly, but this isn't happening. The default is to copy the file to the extensions folder and rename the file part to the ID of the extension.
    *https://developer.mozilla.org/En/Updating_extensions_for_Firefox_4.0#XPI_unpacking
    You can try to set the extensions.alwaysUnpack pref(s) on the <b>about:config</b> page to true.
    It is possible that there is a problem with the file(s) that store the extensions registry.
    Delete the extensions.* files (e.g. extensions.sqlite, extensions.ini) and compatibility.ini in the Firefox profile folder to reset the extensions registry.
    *https://support.mozilla.org/kb/Profiles
    New files will be created when required.
    See "Corrupt extension files":
    *http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
    *https://support.mozilla.org/kb/Unable+to+install+add-ons
    If you see disabled or not compatible extensions in "Firefox/Tools > Add-ons > Extensions" then click the Tools button at the left end side of the Search Bar to check if there is a compatibility update available.
    If this hasn't helped then also delete the addons.sqlite file if present.

  • When going through the download process with social monkee and getting to the point of adding it to firefox I get the following message: 'Social Monkee could not be installed because firefox cannot modify the needed file'. How can this be fixed?

    When going through the download process with social monkee and getting to the point of adding it to firefox I get the following message: 'Social Monkee could not be installed because firefox cannot modify the needed file'. How can this be fixed?

    That is usually caused by a missing unpack directive (&lt;em:unpack&gt;true&lt;/em:unpack&gt;) in the file install.rdf of that extension.
    See https://developer.mozilla.org/En/Updating_extensions_for_Firefox_4.0#XPI_unpacking
    -----

  • Error: "FT DeepDark 11.3.1 could not be installed because Firefox cannot modify the needed file." What does this mean?

    In an earlier version (Firefox v.31) on this, and (presently) on two other PC's, I was/am able to run add-on FT DeepDark 11.3.1 without any problems. It was only recently - after updating to v.32.0.3 on this PC that this situation started. The PC in question is a Dell Dimension 8400 Intel P4 running Windows 7, though I'm thinking it may have something to do with the newer version of Firefox. Could anyone help me with this? I like this add-on because it is easier in my eyes when browsing the internet. Thanks
    PS: Attempted to install the troubleshooter, and again I received a similar error: "Troubleshooter could not be installed because Firefox cannot modify the needed file."

    This error has been reported before in this bug:
    https://bugzilla.mozilla.org/show_bug.cgi?id=730040#c21
    Please read that bug I linked you to and let me know if the last comment in the bug solves your problem. Apparently the problem is about the addon .xpi file being read-only. Try right-clicking it, going to Properties and unchecking the "Read-only" attribute box at the bottom of the dialog. Click Apply, then OK.

  • I am unable to install "Springpad extension" It states "could not be installed because Firefox cannot modify the needed file"

    I have just installed Firefox 4.0. I cannot install the extension called Springpad extension, found here: https://addons.mozilla.org/en-US/firefox/addon/springpad/
    I click add to Firefox, it downloads, prompts me that the author is not verified and I click 'Install Now'. It then says "Springpad extension could not be installed because Firefox cannot modify the needed file". What am I missing here?

    Unable to get Springpad Browser Extension to show up on my browser even though it is with-in my existing add-ons. I was having problems with the Springpad Browser Extension so I thought I would uninstall it and reinstall it but that hasn't worked. So I would like to know how to get it back so I can use it. When I go to the help button and click add-ons to search for Springpad, it does not come up in the results. So I tried using the link on my Springpad homepage website, but it didn't work. Then I searched Firefox support and found this post and tried installing it using the link here. It shows up now in my list of existing add-ons, but when I enabled it, it did not show up on my browser as a clickable icon I can use to spring a web-site. I'm stuck now!
    However, the reason for uninstalling it is there is no longer a"back arrow, the + sign, home, or scissors" at the top of the Springpad Browser Extension for Firefox? I have to log out and back in in order to get back to my notebooks because I am unable to get to them without a home button or a back button...and now I can't just click the scissors to spring a web-page. How are we supposed to spring a web-page now?
    Disappointed,
    Angela

  • Can't install add-ons on my Macbook because firefox "cannot modify the needed file" !!

    I am not sure how to use terminal and commands in the same. Help with the same would be greatly appreciated.

    Hey,
    I'm having the exact same issue, except I'm on OSX 10.8.2 and FF 16.0.1.
    I can't install any extensions. If I try via Tools -> Add Ons, I get the error "There was an error installing <extension-name>". If I try via the addons.mozilla.org site I get the "can't modify file" error msg.
    I have changed '''extensions.alwaysUnpack''' to ''TRUE'', but there is no change.
    Any help would be greatly appreciated.

  • I cannt install erail.in. note is"erail pluginfor firefox could not be installed because firefox cannot modify the needed file". what should i do now

    when i go to www.erail.net for train details. message as"click here to install plugin" displayed and clicked for install then the message "erail plugin for firefox could not be installed because firefox cannot modify the needed file"
    so, further what should i do
    regards. madhu

    You usually get this error if you try to install an extension that needs to be unpacked to work properly.<br />
    Current Firefox version do not unpack an extension automatically, but rename the xpi file to the extension's GUID.
    An extension that needs to be unpacked should have an unpack flag in its install.rdf file
    <pre><nowiki><em:unpack>true</em:unpack></nowiki></pre>
    *https://developer.mozilla.org/En/Updating_extensions_for_Firefox_4.0#XPI_unpacking
    You can try to set the extensions.alwaysUnpack pref to true on the <b>about:config</b> page.
    The extension seems to install, but I haven't tested if it works.
    *https://addons.mozilla.org/firefox/addon/erail-plugin-for-firefox/

  • 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.<br />
    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 <b>extensions.alwaysUnpack</b> to <i>true</i> on the <b>about:config</b> page.
    *http://kb.mozillazine.org/about:config
    * https://developer.mozilla.org/En/Updating_extensions_for_Firefox_4.0#XPI_unpacking

  • [Add-on] could not be installed because firefox cannot modify the needed file

    I've tried both Zotero & Firefox forums with no success:
    Zotero could not be installed because Firefox cannot modify the needed file.
    I've deleted my cache, restarted firefox and computer, tried in various versions of Firefox (currently 8.0 which the add-on store says is compatible). I'm running brand new Mac with Windows for Mac 2011, have tried downloading in Safari & dropping into Firefox, from the Firefox add-ons and directly from the site. The add-ons says - unable to install & both the other methods list the above error (cannot modify the needed file).
    Thanks in advance.

    This can be a problem with the file(s) that store the extensions registry.
    Delete the files extensions.* (extensions.sqlite, extensions.ini, extensions.cache, extensions.rdf) and compatibility.ini in the Firefox [[Profiles|profile folder]] to reset the extensions registry.<br />
    New files will be created when required.
    See "Corrupt extension files":
    * http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
    * Help > Troubleshooting Information > Profile Directory: Open Containing Folder
    If you see disabled, not compatible, extensions in "Tools > Add-ons > Extensions" then click the Tools button at the left side of the Search Bar (or click the "Find Updates" button in older Firefox versions) to do a compatibility check or see if there is an update.

  • I can't install updates. I get a box that says I don't have the permission, to contact the system admin.

    I can't install updates. I get a box that says I don't have the permission. I need to contact the system admin. I'm the sys admin!

    Download a new copy of the Firefox program: http://www.mozilla.com/firefox/all.html
    Trash the current Firefox application to do a clean reinstall.
    Install the new version that you have downloaded.
    Your profile data is stored elsewhere in the [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder], so you won't lose your bookmarks and other personal data.

  • I am trying to install xmarks on Firefox 4 but it tells me Firefox cannot modify the needed file.

    I just upgraded to Firefox 4 and am trying to install xmarks for the first time, but Firefox says it cannot modify the needed file.

    What is the exact error message?

  • Firefox cannot modify the needed file. I get this message when I try to add a theme. I am using Linux Mint 14.

    I am currently using Linux Mint 14 with Firefox 21. I am trying to add new themes and add ons, but I keep getting the message "firefox cannot modify the needed file in linux". How can I correct this?
    Thanks

    Click the Firefox button at the top left, then click the ''Help'' menu and select ''Troubleshooting Information'' from the submenu. If you don't have a Firefox button, click the Help menu at the top and select ''Troubleshooting Information'' from the menu. Go to Open Profile Directory (or something similar) and delete a file named user.js

  • Got an (unlocked) iphone 4s from US and tried activating in India but it throws an error saying 'unable to activate bcos the activation server cannot be reached' ..I tried connecting to itunes through my laptop but it does not detect my iphone..pls help

    Got an (unlocked) iphone 4s from US and tried activating in India but it throws an error saying 'unable to activate bcos the activation server cannot be reached' ..I tried connecting to itunes through my laptop but it does not detect my iphone..pls help

    mithaani wrote:
    Got an (unlocked) iphone 4s from US
    As kb1951 states, unless this phone was purchased directly from Apple, it is not officially unlocked. In the US, only Apple sells officially unlocked iPhones. The message you got generally means your phone was hacked to unlock it...jailbroken...Apple's servers have detected such & are preventing your phone from activating...there's nothing wrong with the activation servers.
    You'll need a sim card from the carrier your phone is locked to in order to activate it. If you don't know what carrier, you'll have to call AppleCare in the US to determine this info. Be aware, US carriers will not authorize official unlocking unless you are a customer that used the phone on their network. Thus, there is most likely no way for you to get this phone officially unlocked.
    Good luck.

  • What does this error message mean? "Blank Tab Multivariate Test Addon could not be installed because Firefox cannot modify the needed file."

    I am running Firefox 6 Beta and have now recieved 2 popups about the Blank Tab Multivariate Test. I finally found info on how to install it. However, when I went to the page suggested and tried to install I got the above error message. I want to know how to solve this problem so I can participate in the test.

    That means that the extension lacks the required <nowiki><em:unpack>true</em:unpack></nowiki> line in the file install.rdf to make sure that the file gets unpacked after installing.<br />
    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.
    *http://kb.mozillazine.org/Profile_folder_-_Firefox
    *https://developer.mozilla.org/en/install_manifests#unpack
    *https://developer.mozilla.org/En/Updating_extensions_for_Firefox_4.0#XPI_unpacking

  • When I try to add on and add-on I get the following message..."(add-on name) could not be installed because FireFox could not modify the needed file"; What is wrong?

    Third party cookies are allowed; I click install when I get a message about an untrusted author;

    That probably means that the extension lacks the required <nowiki><em:unpack>true</em:unpack></nowiki> line in the file install.rdf to make sure that the file gets unpacked after installing.
    *https://developer.mozilla.org/En/Updating_extensions_for_Firefox_4.0#XPI_unpacking
    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.
    Try to set the Boolean pref <b>extensions.alwaysUnpack</b> to <i>true</i> on the <b>about:config</b> page.
    *http://kb.mozillazine.org/about:config

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