Installed plugins disappear when I restart my computer

I am running Firefox 3.6.13. I had a file corruption problem and had to reformat to the factory image and then reinstall all of my software. I used mozbackup to backup firefox settings. I restored and it put back my bookmarks, and passwords fine, but my extensions ansd plugins were not reinstalled. Now I have reinstalled extensions several times. However, whenever I restart my computer they all become uninstalled again. I can open and close firefox without this hapening, however, restarting the computer is a different story.

Delete the files extensions.* (extensions.rdf, extensions.cache, extensions.ini, extensions.sqlite) and compatibility.ini in the Firefox [[Profiles|profile folder]] to reset the extensions registry. New files will be created when required.
See "Corrupt extension files": http://kb.mozillazine.org/Unable_to_install_themes_or_extensions
If you see disabled, not compatible, extensions in "Tools > Add-ons > Extensions" then click the "Find Updates" button (in Firefox 4: right-click the extension -> "Find Updates") to do a compatibility check.

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How can I listen to someone else's library? It briefly did, then disappeared when he restarted his computer. (Info within)

I spent a week with someone far away, and plugged in my iPod to his computer briefly to charge it for my flight home. I don't use my iPod very much, but when I plugged it in recently, I later noticed that "(Name)'s Library" showed up under "Home Sharing" which was under "Shared". I haven't touched sharing or anything. I could see and listen to all of his 5,000 songs. Later, he restarted his computer, and it disappeared, along with Home Sharing tab in the side bar. I actually enjoyed some of his music. We both turned on Home Sharing, I even signed into his Apple ID to see if that would do anything. Nothing.
First, I'm curious why it showed up in the first place. Second, I'd like to know how to get it back. I see on the internet sharing is easy for local networks, but we're in different countries. And it was on separate Apple ID accounts.
Help?

Hello Auralous,
Thanks for using Apple Support Communities.
For more information on this, take a look at:
Troubleshooting Home Sharing
http://support.apple.com/kb/ts2972
Best of luck,
Mario

I have downloaded the updates on my macbook air but when i restart my computer it says can not install updates due to an unexpected error????

i have downloaded the updates for my macbook air and when i restart the computer it says that they can not be installed because and error occured i have tried 3 times

A common hangup for updates is corrupted file permissions.
Using Disk Utility, perform a Repair Disk Permissions on your main drive, then re-attempt the update.

I am unable to open Safari. It was working yesterday before I installed the update. The update seemed to be automtic when I restarted my computer. I am running 10.9.5. I don't want to lose my contacts, bookmarks etc if I have to delate the app.

I am unable to open Safari. It was working yesterday before I installed the update. The update seemed to be automatic when I restarted my computer. I am running 10.9.5. I don't want to lose my contacts, bookmarks etc if I have to delete the app. Any suggestions?

Launch the Console application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Console in the icon grid.
The title of the Console window should be All Messages. If it isn't, select
SYSTEM LOG QUERIES ▹ All Messages
from the log list on the left. If you don't see that list, select
View ▹ Show Log List
from the menu bar at the top of the screen. Click the Clear Display icon in the toolbar. Try to launch Safari. Select any messages that appear in the Console window. Copy them to the Clipboard by pressing the key combination command-C. Paste into a reply to this message by pressing command-V.
The log contains a vast amount of information, almost all of which is irrelevant to solving any particular problem. When posting a log extract, be selective. A few dozen lines are almost always more than enough.
Please don't indiscriminately dump thousands of lines from the log into this discussion.
Please don't post screenshots of log messages—post the text.
Some private information, such as your name, may appear in the log. Anonymize before posting.

I download and install Firefox 4, but when I restart my computer, it reverts to v. 3.5 something. How do I make the new version stick?

Firefox kept trying to update v. 3.5.?.?, usually failing. So, I went to the website, then downloaded and installed v. 4. But, when I restart my computer, it reverts back to the old version, loses bookmarks added while using v. 4, and again tries to update v. 3.5. When I look in the folder which contains Firefox, "properties" says I have v. 4, even though what is appearing is not.

See:
* http://kb.mozillazine.org/Preferences_not_saved

When i try to install snow leopard with install disk, it has me restart the computer instead of installing. can anyone help me figure out how to get the disk to actually install?

when i try to install snow leopard with install disk, it has me restart the computer instead of installing. can anyone help me figure out how to get the disk to actually install?

Ok, it's just a glitch that it's not auto-rebooting from the disk.
Please backup your personal files off the machine to a regualr external drive and disconnect all drives before doing anything
Take the 10.6 disk out and clean and polish the bottom with a very soft clean cloth and a tiny bit of rubbing alcohol to cut the oils.
Stick the disk in and reboot holding c key down, this will make it boot from the disk and you can install Snow Leopard that way.

Flash quits working when I restart my computer and I have to uninstall and reinstall every time

HELP! I've been working on this for 11 hours non-stop!
I have Windows 7 64bit. I'm using the newest Firefox browser. I install Flash and it seems to sort of work. It is in my Control Panel Uninstall programs with the Flash icon.
When I restart my computer and go to the Adobe site it shows that Flash isn't working. It's still in the Control Panel Uninstall programs BUT it has no icon. So I have to uninstall it and reinstall it to use it.
When I go to any Zynga.com games and right click on the game window the Flash window opens but when I click on Settings it freezes and I have too right click and left click a lot for it to go away. So I can't allow the site to use 100% of Flash to run on the site. Once in a while if I wait a few minutes Settings will open and I set it to 100% but when I go back and look at it later it says I am using 0%.
I have Norton 360 and have turned it off and uninstalled and reinstalled repeatedly only to have the same problem occur.
Before I installed Windows 7 and had Vista Ultimate it worked better but still not as good as it should have.
Also in my Firefox plugins Shockwave is there but no Flash plugin is ever there with Flash installed or uninstalled. Should Flash be there and where did Shockwave come from? Firefox?
Do I need Shockwave for Zynga or Facebook games? Or at all for that matter. I'll install it for no good reason as long as it doesn't screw something up.
After 11 hours of this Adobe HELL I am burnt! So ANY help is greatly appreciated!
Thanks to anyone who can help me. THANK YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Replied in your other post.

I have Lightroom 6 (not CC) on a Windows machine. I'm prompted to log into Creative Cloud when I restart my computer (I don't have, use, or pay for Creative Cloud), and then when I launch Lightroom, it tells me to use the application I have to log into m

I have Lightroom 6 (not CC) on a Windows machine. I'm prompted to log into Creative Cloud when I restart my computer (I don't have, use, or pay for Creative Cloud), and then when I launch Lightroom, it tells me to use the application I have to log into my Adobe account...AGAIN! And then to further add insult to injury, I'm prompted to enter in the license number of my product. I've gone through this process a dozen times now...SCREAM!!!

Paulou12 what type of a Creative Cloud Membership do you have? You can find details on how to update Lightroom using the Creative Cloud Desktop application at Install and update apps - https://helpx.adobe.com/creative-cloud/help/install-apps.html.
Finally if you are in a managed environment then please work with your I.T. department to apply the update.

After updating with iTunes 12.1 for Windows 8.1, when I restarted my computer, my headphones no longer work. According to my computer they do. Is this an iTunes issue?

After updating with iTunes 12.1 for Windows 8.1, when I restarted my computer, my headphones no longer work. According to my computer they do. Is this an iTunes issue? I did the audio troubleshooting and it says everything is fine. I have a Toshiba Satellite L75D-A7280.

Download/install an app is a know possible solution.
3. Install another app from the App Store
If all user-installed apps are not launching, it could be an Apple ID authorization issue. Download and install an app that isn't already installed on your device to reset this information.
Note: If you have installed apps using multiple Apple ID accounts, you may need to perform this step for each account.
Above from Apple's :
iOS: Troubleshooting applications purchased from the App Store

Don't want to install software update when I restart

I'm not interested in upgrading to Yosemite from Mavericks. I must have clicked on the wrong button and downloaded new software, because my mid 2009 MacBook Pro says it's ready to install new software when I restart. How can I undue this so that when I restart I don't install the software waiting to be installed? Thanks.

Right after you restart the computer by ready to hit COMMAND-Q as soon as you see the installer appear. If it hasn't already started in the background you may get out before it starts the installation. If not, then welcome to Yosemite. Really, it's not that bad.

I accidently downloaded something that made my webcam flash on spuradically even once i deleted it. when i restarted my computer it got stuck at the white loading screen with the grey apple and wont go past there..what is wrong? will applecare cover this?

i accidently downloaded something that made my webcam flash on spuradically even once i deleted it. when i restarted my computer it got stuck at the white loading screen with the grey apple and wont go past there..what is wrong? will applecare cover this? my computer also slowed down drastically before it stopped working..thanks! HELP PLEASE!

Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a boot failure is to secure your data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since your last backup, you can skip this step.
There are several ways to back up a Mac that is unable to boot. You need an external hard drive to hold the backup data.
a. Boot into the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.”
b. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, boot the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
c. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to boot, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can boot now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
If you've booted from an external storage device, make sure that your internal boot volume is selected in the Startup Disk pane of System Preferences.
Step 3
Boot in safe mode. Note: If FileVault is enabled, or if a firmware password is set, or if the boot volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know your login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you boot in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, your boot volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 5.
If you can boot and log in now, empty the Trash, and then open the Finder Info window on your boot volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then reboot as usual (i.e., not in safe mode.)
If the boot process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 4
Sometimes a boot failure can be resolved by resetting the NVRAM.
Step 5
Launch Disk Utility in Recovery mode (see Step 1.) Select your startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then reboot as usual.
Step 6
Reinstall the OS. If your Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 7
Repeat Step 6, but this time erase the boot volume in Disk Utility before installing. The system should automatically reboot into the Setup Assistant. Follow the prompts to transfer your data from a Time Machine or other backup.
Step 8
This step applies only to older Macs (not current models) that have a logic-board ("PRAM") battery. Both desktop and portable Macs used to have such a battery. The logic-board battery is separate from the main battery of a portable. A dead logic-board battery can cause a gray screen at boot. Typically the boot failure will be preceded by loss of the startup disk and system clock settings. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 9
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store to have the machine tested. If you can't get to an Apple Store, go to another authorized service provider.

How do I disable Firefox from starting automatically when I restart my computer

When I restart my computer (MacBook Pro) Firefox (18.0.2) automatically starts up.

See:
* https://support.mozilla.org/kb/Firefox+launches+automatically+when+your+computer+starts

I have an iMac that I am running OSX 10.8.3 on. I keep trying to install 10.8.4 but it will not install. I tried updating and installing several times and it restarts the computer but it will not install the software. My machine is about 8 months old.

I have an iMac that I am running OSX 10.8.3 on. I keep trying to install 10.8.4 but it will not install. I tried updating and installing several times and it restarts the computer but it will not install the software. My machine is about 8 months old so, it's in the newish range. HELP!

Sometimes the App Store version doesn't work correctly. In this case, install 10.8.4 with the Combo version > http://support.apple.com/kb/DL1659?viewlocale=en_US&locale=en_US
The Combo installer is the safest way to update OS X, and it allows you to update more than one computer with a single download

HT1338 I just purchased my macbook pro yesterday and the update combined it downloads but when i restart the computer it says something went wrong and it won't work i don't know where to start to download this update

I just purchased my macbook pro yesterday and the update combined it downloads but when i restart the computer it says something went wrong and it won't work i don't know where to start to download this update

Try here:
http://support.apple.com/kb/DL1524

When I restart my computer, preferences are reset?

When I restart my computer after updates/etc., my dock is reset to include default apps, while removing custom folders/apps or "forgetting" (shown as "?") the location of certain apps. This happens regardless of whether I accept or deny a keychain-looking request on boot, pre-login that asks for admin confirmation to "modify" settings or so. This is annoying because i have to drag all unwanted apps off of the dock. It also resets all the desktop size/grid/alignment settings.
My harddrive was replaced by a certified Apple Technician and is now a solid state drive. The computer finds the startup disk "f", which shows up under the harddrive in disk utility. OSX.8.1, 4GB RAM, these updates on a mid-2009 13" Macbook.
Side note,
Microsoft Word also seems to be negatively affected by OSX.8. Autosave doesn't appear to work? It consistantIy tells me that autosave or autorecovery have failed. I have the latest MS Office and have google to try and solve--some files are suddenly "read only", and older .doc files cannot be opened. I have old reference data and passwords in some of these files! Losing them is not ok.

I tried the disk verify/repair, but the same problems persist. Also ran all available udpates.
The warning dialogue/password prompt at boot asks to "modify network configuration". It seems unnecessary for it to always come up? Probably not related to the desktop/dock issues but confusing too.

Installed plugins disappear when I restart my computer

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