After upgrading to 8.0.1 Firefox will download but not install extensions after upgrading to 8.0.1

Windows Vista. Avast Antivirus with Sandbox feature.
Outside Sandbox - all extensions available. Within Sandbox - no extensions available and not able to install any extensions. ie Adblock Plus, No Script etc.
Before upgrading to 8.0.1 no problems in either mode. Add-ons appear to be intact in either mode.
When attempting to install an extension after downloading:
"(extension) could not be installed because Firefox cannot modify the needed file".
Reluctant to delete pluginreg dat file because all extensions are working outside Sandbox.

Hi,
You may have to "trust' the upgraded Firefox, if there is such a setting in Avast and install extensions after starting Firefox outside of the sandbox - normally. Not sure about Avast, but usually a sandbox would mean a virtual area like hard disk storage, registry settings etc. for the sandboxed app and once the application is closed or the computer is shutdown, everything that was done by the app or via the app is sort of vaporized and the application and it's settings are returned to it's previous permanent state.

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This usually means a corrupted OS X installation, so I would try reinstalling OS X:
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Hey DrRuss,
Usually issues installing iTunes on Windows can be resolved after going through these troubleshooting steps. If one step does not resolve your issue, proceed to the next:
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http://support.apple.com/kb/HT1926
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See the sticky thread at the top of this section titled "64bit Palm Desktop drivers are here!"
WyreNut
I am a Volunteer here, not employed by HP.
You too can become an HP Expert! Details HERE!
If my post has helped you, click the Kudos Thumbs up!
If it solved your issue, Click the "Accept as Solution" button so others can benefit from the question you asked!

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<br />
Application Basics
Name
Firefox
Version
3.6.25
Profile Directory
Show in Finder
Installed Plugins
about:plugins
Build Configuration
about:buildconfig
Extensions
Name
Version
Enabled
ID
Adblock Plus
2.0.3
true
{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}
ColorfulTabs
4.8.0.5
true
{0545b830-f0aa-4d7e-8820-50a4629a56fe}
Download Statusbar
0.9.10
true
{D4DD63FA-01E4-46a7-B6B1-EDAB7D6AD389}
DownloadHelper
4.9.8
true
{b9db16a4-6edc-47ec-a1f4-b86292ed211d}
Fasterfox
3.9.8
true
{c36177c0-224a-11da-8cd6-0800200c9a91}
FastestFox
4.7.4
true
[email protected]
FlashGot
1.3.7
true
{19503e42-ca3c-4c27-b1e2-9cdb2170ee34}
Forecastfox
2.0.21
true
{0538E3E3-7E9B-4d49-8831-A227C80A7AD3}
gui:config
1.2.2
true
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HashColouredTabs+
0.4.23
true
[email protected]
Image Toolbar
0.6.8
true
{A4732521-77D9-447E-A557-B279AC923F06}
Media Converter
1.0.3
true
{6e764c17-863a-450f-bdd0-6772bd5aaa18}
NoScript
2.2.8
true
{73a6fe31-595d-460b-a920-fcc0f8843232}
Open Image In New Tab
1.1
true
[email protected]
Password Exporter
1.2.1
true
{B17C1C5A-04B1-11DB-9804-B622A1EF5492}
Screengrab
0.96.3
true
{02450954-cdd9-410f-b1da-db804e18c671}
Subtile
1.3
true
{88ce39f5-1e54-477c-809d-93d411720f0c}
Tab Mix Plus
0.3.8.7
true
{dc572301-7619-498c-a57d-39143191b318}
TrackMeNot
0.6.728
true
[email protected]
Unhide Passwords
1.2.7.0
true
{2e17e2b2-b8d4-4a67-8d7b-fafa6cc9d1d0}
UrlbarExt
1.8.1
true
{10c62ce3-3794-4c18-a881-481733c1a425}
CuteMenus2
3.2
true
{71C54606-83ED-4ea6-9315-1AAB29466D33}
Ghostery
2.7.1
true
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Modified Preferences
Name
Value
accessibility.blockautorefresh
true
browser.history_expire_days.mirror
180
browser.history_expire_days_min
0
browser.link.open_newwindow.override.external
-1
browser.link.open_newwindow.restriction
0
browser.places.smartBookmarksVersion
2
browser.startup.homepage
about:blank
browser.startup.homepage_override.mstone
rv:1.9.2.25
browser.tabs.closeWindowWithLastTab
false
browser.tabs.warnOnClose
false
browser.zoom.full
false
dom.disable_window_move_resize
true
dom.event.contextmenu.enabled
false
extensions.checkCompatibility
true
extensions.lastAppVersion
3.6.25
font.default.x-western
sans-serif
font.minimum-size.x-western
14
font.name.sans-serif.x-western
Arial Rounded MT Bold
font.name.serif.x-western
Arial Black
font.size.fixed.x-western
18
font.size.variable.x-western
18
javascript.options.showInConsole
true
javascript.options.strict
true
network.cookie.cookieBehavior
1
network.cookie.prefsMigrated
true
network.http.max-connections
24
places.last_vacuum
1323804497
print.macosx.pagesetup-2
PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTgiPz4KPCFET0NUWVBFIHBsaXN0IFBVQkxJQyAiLS8vQXBwbGUgQ29tcHV0ZXIvL0RURCBQTElT…
print.print_bgcolor
false
print.print_bgimages
false
print.print_command
print.print_downloadfonts
false
print.print_evenpages
true
print.print_in_color
true
print.print_margin_bottom
0.5
print.print_margin_left
0.5
print.print_margin_right
0.5
print.print_margin_top
0.5
print.print_oddpages
true
print.print_orientation
0
print.print_pagedelay
500
print.print_paper_data
0
print.print_paper_height
11.00
print.print_paper_size_type
1
print.print_paper_size_unit
0
print.print_paper_width
8.50
print.print_printer
print.print_reversed
false
print.print_scaling
1.00
print.print_shrink_to_fit
true
print.print_to_file
false
print.print_unwriteable_margin_bottom
56
print.print_unwriteable_margin_left
25
print.print_unwriteable_margin_right
25
print.print_unwriteable_margin_top
25
privacy.clearOnShutdown.extensions-tabmix
true
privacy.clearOnShutdown.offlineApps
true
privacy.cpd.extensions-tabmix
true
privacy.cpd.siteSettings
true
privacy.sanitize.migrateFx3Prefs
true
privacy.sanitize.sanitizeOnShutdown
true
security.OCSP.disable_button.managecrl
false
security.default_personal_cert
Select Automatically
security.disable_button.openDeviceManager
false
security.warn_viewing_mixed
false

Hi Redfyre-
Here is an article on troubleshooting issues with the java plugin:
[[Using the Java plugin with Firefox]]
Hopefully that will help- especially the Java test page.

I don't want to upgrade to FireFox 6 and it is downloaded but not installed

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Contact Apple and ask them...
Caveat Emptor

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Same issue here and unfortanetly no one yet has an answer...

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After updating to 3.6.7, Firefox will not start on my Mac. Happened also with the last update. Is anyone else having this problem? I'm running updated OX 10.6.4 on an i7.

Last time (a few weeks ago) I had to uninstall firefox and reinstall it. Today I moved the last version to the trash and reinstalled the new version, but it still won't work. I obviously can't do this every time there is a new update. When I click on firefox, the icon bounces in the dock (like it's trying to open), and then nothing happens.
== This happened ==
Every time Firefox opened
== I updated to 3.6.7 today ==
== User Agent ==
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-us) AppleWebKit/533.16 (KHTML, like Gecko) Version/5.0 Safari/533.16

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Ever since upgrading to Mountain Lion, my AOL messages sometimes, but not always open with a blank page. If I open AOL in Firefox, the messages open fine. This does not happen with any messages by any means, and it is not any type of certain message

Ever since upgrading to Mountain Lion, my AOL messages sometimes, but not always open with a blank page. If I open AOL in Firefox, the messages open fine. This does not happen with any messages by any means, and it is not any type of certain message. In fact, in the same screen I can often open an email from the same sender with email intact. This is weird. Sometimes I close the page and open a new page. Sometimes that works and sometimes it does not. It is a very annoying thing.

Hi,
When you start Messages fro the first time you are asked for an Apple ID
When this is verified and entered it appears in Messages Menu > Preference > Accounts and is Enabled.
The App should have also picked on on those iChat Accounst you had before.
These should be Enabled if they were when you last used iChat.
Exactly which "Accounts" are logged in can be seen in Message Menu > Accounts and will include the iMessage "Account" and Bonjour.
In the Window menu you will see CMD +0 for the Messages window and CMD+1 for the "Buddies" window which is a combined list at this stage.
Go to the Preferences > General Section and Untick the "Collect all accounts into one list".
This will give you separate iChat type Buddy lists.
You can check if that account/Buddy list is set to Invisible or if in the Preferences > Accounts > Security you have settings that will block some people from seeing you as On line.
You are saying Buddies can see you as On Line which implies they are still sending to your AIM based Names (@Mac.com is a valid AIM Screen Name)
I am not sure from your post if you are trying to iMessage their email IDs thinking they are Apple IDs and that they are using Messages as well.
There is no Buddy list for iMessages side
No-one can tell you are "On Line" until they have your details in the "To" spot in Messages with the correct iMessaged contact info (iPhone Number or Apple ID)
Obviously an Apple ID can be an email or look like one.
In some cases they are also valid AIM Screen Names as well.
In the case or the @mac.com name you may have linked this Apple ID to iMessages as well.
11:31 PM Saturday; August 11, 2012
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
 iMac 2.5Ghz 5i 2011 (Lion 10.7.2)
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb (Snow Leopard 10.6.8)
 Mac OS X (10.6.8),
"Limit the Logs to the Bits above Binary Images."  No, Seriously

After upgrading to 8.0.1 Firefox will download but not install extensions after upgrading to 8.0.1

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