Set up app tabs bi pining when firefox closes and is reopened app tabs have disappeared, Why

all the information i have is contained in one line. Set up app tabs close fire fox and then reopen. i do nothing between these 2 tasks. Did this 5 times and it still does not work

You can check for problems with the files sessionstore.js and sessionstore.bak in the Firefox Profile Folder that store session data.
Delete the sessionstore.js file and possible sessionstore-##.js files with a number and sessionstore.bak in the Firefox Profile Folder.
*Help > Troubleshooting Information > Profile Directory: Open Containing Folder
*http://kb.mozillazine.org/Profile_folder_-_Firefox
Deleting sessionstore.js will cause App Tabs and Tab Groups and open and closed (undo) tabs to get lost, so you will have to create them again (make a note or bookmark them).
*http://kb.mozillazine.org/Multiple_profile_files_created

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In System Prefereneces, when I am in Desktop and Screen Saver, I am unable to remove folders. I can click the "-" and the folder appears to be gone, but when I close and then reopen System Preferences, and open Desktop and Screen Saver, the folder reappea

In System Prefereneces, when I am in Desktop and Screen Saver, I am unable to remove folders. I can click the "-" and the folder appears to be gone, but when I close and then reopen System Preferences, and open Desktop and Screen Saver, the folder reappears in the list. I have tried deleting preferences "plist" but I am totally unable to remove the folders.

I've seen one other report like yours, and I think the issue is caused by a bug, but I don't know what triggers it.
Please read this whole message before doing anything.
This procedure is a diagnostic test. It’s unlikely to solve your problem. Don’t be disappointed when you find that nothing has changed after you complete it.
The purpose of the test is to determine whether the problem is caused by third-party software that loads automatically at startup or login, by a peripheral device, or by corruption of certain system caches.
Disconnect all wired peripherals except those needed for the test, and remove all aftermarket expansion cards. Boot in safe mode and log in to the account with the problem. 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. Ask for further instructions.
Safe mode is much slower to boot and run than normal, and some things won’t work at all, including sound output and Wi-Fi on certain iMacs. The next normal boot may also be somewhat slow.
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. Test while in safe mode. Same problem? After testing, reboot as usual (i.e., not in safe mode) and verify that you still have the problem. Post the results of the test.

Tabs not saved when Firefox closes!

Why oh why has Firefox 6.0.2 (on Mac) stopped automatically saving and re-opening TABS when restarted?
I've read a million Help articles and verified all the recommended settings are applied but I'm sorry, this new Tabs functionality is counter-intuitive and just plain misleading. Firefox saves Tabs, but only if it's closed in *this* particular way? Please. I'm having enough trouble adjusting to the use of a Mac, without Firefox compounding the problem by removing / obstructing the use of a feature that was previously easy to use, and made perfect sense! If we click "Show my windows and tabs from last time", it means we want Firefox to SHOW MY WINDOWS AND TABS FROM LAST TIME! Even if we click the "X" button to close Firefox.
Anyway the bottom line is that I've lost all my working TABS (again), but this time clicking on the History menu, the "Restore Previous Session" command is DISABLED. What options do I have? I haven't restarted Firefox once since having my Tabs disappear, so they should still be saved somewhere. (in the BAK file?)
And I don't want to have to sift through months of history to try and find all the Tabs I had open!
This new logic that makes it more complicated to save Tabs across sessions is NOT an improvement!
Thanks in advance.

Tabs are only saved if you close (Firefox > Quit) the Firefox application while those tabs are still showing. If you close a window and still have the menu bar visible then you wont reopen already close tabs. You may need to be able to reopen the three last closed windows via History > Recently closed Windows.

When firefox crashes and reopens it offers to restore pages hours/days old.

When firefox crashes and is reopened, it usually brings up the pages that were open during the crash, but many times when firefox crashes, it will offer to restore pages that I did look at but that are hours/days old.
e.g.
I will be on youtube, facebook, my school website, and pandora. Firefox crashes. I reopen. Firefox offers to restore google search, my email, and wordpress, which I had looked at the night before.

I have a similar problem. Recently my FF8 has been crashing a lot. It regularly locks up an entire core of my PC and often just shuts down. It has just done it a moment ago and when it started back up it did the whole "this is embarrassing" thing and asked me if I wanted to reload my tabs. I deselected the one that I was trying to view as I suspected that it may have been the cause (unlikely; it was node4.co.uk) but anyway, let's skip it just in case. Click on the button to restore and up pops my homepage only. So all of my other tabs, which I was using for work incidentally, are gone.
This is not the first time this has happened on FF8. It happened a lot recently on FF6 I think it was (so hard to keep track now, Mozilla) and I switched to Chrome as a result, but it turns out that it crashes even more than FF6 did. FF7 was a vast improvement but FF8 is so unstable/unpredictable for me at the moment that I think I'd rather use IE9 than this. It's driving me mental, clearly! I wish I could kill the process manually and have it retry restoring tabs. Hey, there's an idea Mozilla; give us a menu item that allows us to restore the session to how it started to try again or at the very least get a list of the pages we were looking at. They don't show up in Recently Closed Windows and the Restore Previous Session is greyed out too. Gah! Help!

What's the difference between keep cookies until I close firefox and clear cookie history when firefox closes?

In the settings for Firefox 33.0 (I am using Ubuntu 14.04 but the functionality is the same for Windows 7) there are two different ways to delete cookies when firefox closes. Or at least there seems to be.
First is the keep cookies until firefox closes
Second is to check the box to clear history when firefox closes and in the settings check cookies.
What is the difference between these two options?
I usually have both setup but I was noticing that a login was not saving for td canada trust easyweb, even though I have an exception set for it. Now I unchecked to delete cookies when clearing the history on close and the login saves correctly.
This login saves 7 cookes under easyweb.td.com and 10 cookies under td.com and I have exceptions set for both. If I clear history on close and include cookies, half of the td.com cookies are gone when I close firefox and re-open. The same is true if I don't set the exception.
So currently I cannot figure out a way to keep all the cookies if I clear cookie history when firefox closes. What is the difference when this is enabled?

Let all cookies expire when Firefox is closed to make them session cookies.
*Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: Keep until: "I close Firefox"
Create a cookie 'allow' exception for cookies that you would like to keep.
*Firefox/Tools > Options > Privacy > "Use custom settings for history" > Cookies: Exceptions
Clearing "Site Preferences" clears all exceptions for cookies, images, pop-up windows, software installation, passwords, and other website specific data.
Clearing cookies will remove all specified (selected) cookies including cookies with an allow exception that you would like to keep.
*Tools > Options > Privacy > Firefox will: "Use custom settings for history": [X] "Clear history when Firefox closes" > Settings
*https://support.mozilla.org/kb/remove-recent-browsing-search-and-download-history

Firefox 4 forgets all my APP TAB tabs when configured to automatically clear browsing history when Firefox closes? Not much of a feature!

When I configure
Options>Privacy>History -> Clear history when Firefox closes -> When I quit Firefox, it should automatically clear all: -> Browsing History
all of my App Tab tabs are cleared, as well. Do I have to give up my privacy in order to use the App Tab feature?

You can try to select only one setting at the time in [[Clear Recent History]] to see which one is causing the crash.

Is there anyway to get an App Tab to stay when I close the program then reopen it?...they always disappear when I open a new window etc.

Is there anyway to get an App Tab to stay when I close the program then reopen it?...they always disappear when I open a new window etc.
And I thought the whole point of an App Tab was to always have those tabs there no matter what window is open all the time period.
It's a minor complaint but I would really appreciate the option to permanently have them there.

I thought that app tabs would be more persistent, like pinning programs to the taskbar in Windows, but this is not the case.
Instead, once you close a Firefox window, all its tabs and app tabs are lost.
Essentially, this means that the close button in the upper-left corner of a Firefox window is now a "kill all open tabs and loose all App Tabs without warning++ " button. That is not cool.
I realize that "Firefox > Quit Firefox" behaves as intended, but many people use the more obvious red close button instead of the menu to close windows on a Mac. And it is easy to forget that the red button is now also an app-tab-death button. I've lost my app tabs many times to this issue. It is an unforgiving user interface decision which hampers the usability of app tabs. Why should I go through the extra clicks of setting up app tabs if I can loose them so easily?
Ideally, App Tabs could be saved separately from the currently open windows (perhaps create an option to save then to a special Tab Group that opens on startup?). App tabs would be exceedingly useful to me if they weren't so easy to loose.
On that note, saving Tab Groups would also be a useful functionality.
++ You will get a "closing multiple tabs" warning if you have only one window open, and that one window has multiple non-app tabs open, and you have enabled the warning in Preferences. But this too unreliable to help prevent the loss of app tabs.

My open tabs are not being remembered when I close and re-open Firefox 4 even though I selected this feature in Options.

My open tabs are not being remembered when I close and re-open Firefox 4 even though I selected this feature in Options. Can anyone tell me why?

App tabs and Tab Groups (Panorama) are stored as part of the session data in the file sessionstore.js in the [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder]
* http://kb.mozillazine.org/Session_Restore
Make sure that you do not use [[Clear Recent History]] to clear the "Browsing History" if Firefox is closed.

My firefox always opens a crash report when I close it. Even if I have no tabs open and close firefox.

The Crash information is:
AdapterDeviceID: 95c4
AdapterVendorID: 1002
Add-ons: TFToolbarX@torrent-finder:1.2.6,{1de0de3c-0b5c-4f67-90c6-689623894991}:0.3,{9fb7d178-155a-4318-9173-1a8eaaea7fe4}:2.1.11,{B17C1C5A-04B1-11DB-9804-B622A1EF5492}:1.2.1,{c0c9a2c7-2e5c-4447-bc53-97718bc91e1b}:5.4,{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}:1.3.9,{D4DD63FA-01E4-46a7-B6B1-EDAB7D6AD389}:0.9.8,{ef4e370e-d9f0-4e00-b93e-a4f274cfdd5a}:1.4.4,{b9db16a4-6edc-47ec-a1f4-b86292ed211d}:4.9.5,[email protected]:4.0.2,{1E73965B-8B48-48be-9C8D-68B920ABC1C4}:10.0.0.1410,avg@igeared:7.008.031.001,[email protected]:1.3.5
AvailableVirtualMemory: 3804364800
BuildID: 20110902133214
CrashTime: 1316851060
EMCheckCompatibility: true
Email: [email protected]
FramePoisonBase: 00000000f0de0000
FramePoisonSize: 65536
InstallTime: 1315413340
Notes: AdapterVendorID: 1002, AdapterDeviceID: 95c4, AdapterDriverVersion: 8.872.0.0
D2D? D2D+
DWrite? DWrite+
D3D10 Layers? D3D10 Layers+
ProductName: Firefox
ReleaseChannel: release
SecondsSinceLastCrash: 452
StartupTime: 1316850895
SystemMemoryUsePercentage: 78
Theme: LavaFox_V1-Blue
Throttleable: 1
TotalVirtualMemory: 4294836224
URL: https://support.mozilla.com/en-US/questions/new?product=desktop&category=d2&search=My+firefox+always+opens+a+crash+report+when+I+close+it.+Even+if+I+have+no+tabs+open+and+close+firefox.&showform=1
Vendor: Mozilla
Version: 6.0.2
Winsock_LSP: MSAFD Tcpip [TCP/IP] : 2 : 1 :
MSAFD Tcpip [UDP/IP] : 2 : 2 : %SystemRoot%\system32\mswsock.dll
MSAFD Tcpip [RAW/IP] : 2 : 3 :
MSAFD Tcpip [TCP/IPv6] : 2 : 1 : %SystemRoot%\system32\mswsock.dll
MSAFD Tcpip [UDP/IPv6] : 2 : 2 :
MSAFD Tcpip [RAW/IPv6] : 2 : 3 : %SystemRoot%\system32\mswsock.dll
RSVP TCPv6 Service Provider : 2 : 1 :
RSVP TCP Service Provider : 2 : 1 : %SystemRoot%\system32\mswsock.dll
RSVP UDPv6 Service Provider : 2 : 2 :
RSVP UDP Service Provider : 2 : 2 : %SystemRoot%\system32\mswsock.dll
This report also contains technical information about the state of the application when it crashed.

Have a read of the rather complicated article
* [[firefox crashes]]
* and for anyone with firefox crashing before you can key in about:crashes see: http://kb.mozillazine.org/Breakpad#Location_of_crash_reports
I note you have found bp-54df2ba6-de52-405d-9ccc-4dd272110924 have you any other recent crash signatures or crash IDs, the one you provide seems rather uncommon [https://crash-stats.mozilla.com/report/list?product=Firefox&query_search=signature&query_type=exact&query=karasx2.dll%400x2535&reason_type=contains&date=09%2F24%2F2011%2001%3A44%3A07&range_value=1&range_unit=weeks&hang_type=any&process_type=any&do_query=1&signature=karasx2.dll%400x2535 [karasx2.dll%400x2535]]
Do you still get the problem in [[safe mode]] and with default themes, and all plugins disabled. Note common causes of crashes are malware, and versions of the software IDvault. (do you use IDvault ? - often provided by Comcast)

When I update some of my addons, everytime I open firefox information about update is in new tabs, even "welcome to firefox" is always there in new tab! It's very annoying!

Question
When I update some of my addons, everytime I open firefox information about update is in new tabs, even "welcome to firefox" is always there in new tab! It's very annoying!

Ok I found a solution that worked for me, I simply dragged the user.js and the user.js.BAK to the desktop, before that I had done the same with the prefs.js and prefs.js.BAK, but that didn't help, so it's apparently the user file that was an error with.
It was the link from cor-el that helped me on the way http://kb.mozillazine.org/Preferences_not_saved
It's at the bottom titled User.js file locks certain preferences.
This article can also help https://support.mozilla.com/en-US/kb/Preferences%20are%20not%20saved
It have still not made a new user.js file, but everything runs fine, hope this can help others to.

Why does Firefox sometimes ask me if I want to save my tabs when I close, and sometimes it does not? I usually want to save them, so this is a pain. I'm on a Mac, OS 10.5.8

Why does Firefox sometimes ask me if I want to save my tabs when I close, and sometimes it does not? I usually want to save them, so this is a pain. I'm on a Mac, OS 10.5.8
== This happened ==
A few times a week
== don't know...

There can be various causes for this:
[[Firefox does not ask to save tabs and windows on exit]]

When firefox crashes it not restoring my tabs I once had up ? :(

when firefox crashes it not restoring my tabs I once had up ? :(

You can use this button to go to the Firefox profile folder:
*Help > Troubleshooting Information > Profile Directory: Open Containing Folder
If you get that "Well, this is embarrassing" window then that means that Firefox has crashed more than once and there should be a sessionstore.js and sessionstore.bak file.
See also:
*http://kb.mozillazine.org/Session_Restore
*https://support.mozilla.org/kb/Session+Restore

My pinned App Tabs do not reappear after I close and then reopen Firefox 4. Why is this happening? What can I do about it?

Using Firefox 4:
I right-click on a tab to "pin as app tab."
The new app tab appears as expected.
But after I close and then reopen Firefox 4, my app tab(s) no longer appear. They go away. Repeated cycles of the above do not keep the app tabs present .
Advise on this would be appreciated.
Thank you.

I have been having this problem on occasion for a while. (Most recently in firefox 7) I just discovered that I had a phantom firefox.exe process running for some reason. This has the same effect as closing your tabbed window before a non tabbed window. I killed the process and my app tabs magically work again.

I installed Firefox 4 and the Orange App button plus the reload and stop are not showing

I installed Firefox 4 and the Orange App button plus the reload and stop are not showing.

You see the orange (on Linux gray) Firefox button if the Menu Bar is hidden, so you need to hide the Menu bar to get the new appearance. 
If you need to access the hidden Menu bar then press F10 or hold down the Alt key to make the Menu Bar appear temporarily. 
You can also place the Tab Bar on top.
* View > Toolbars : [ ] Menu Bar
* View > Toolbars : [X] Tabs on Top
Firefox 4 uses a combined Stop/Reload/Go button that is positioned at the right end of the location bar. 
During the page load process it shows as a Stop button and after the loading has finished the button is changed to a Reload button. 
If you type in the location bar then that button becomes a Go button. 
You can middle-click that Reload button to duplicate the current tab to a new tab.
To move the Stop and Reload buttons to their position to the left of the location bar you can use these steps:
* Open the "View > Toolbars > Customize" window to move the Stop and Reload button out of the location bar.
* Drag the Reload and Stop buttons to their previous position to the left of the location bar.
* Set the order to "Reload - Stop" to get a combined "Reload/Stop" button.
* Set the order to "Stop - Reload" or separate them otherwise to get two distinct buttons.

Even though I set "Use custom settings for history" when I close the window and recheck it has set itself back to "Rember History"..why?

I am having trouble getting the settings to stay and can't figure out why...no matter what I do it just resets every time back to the
"Remember History" and it won't save passwords on some of my sites.

Firefox shows the "(Never) Remember history" choice if all the history and cookie setting are the default. 
Make at least one change to the default setting if you want "Use custom settings for history" to stay selected. 
Otherwise Firefox will revert to "(Never) Remember history" if you return to the Privacy tab. 
The choice "Use custom settings for history" will stay selected as long as not all settings are the default to make you aware that you made changes. 
* Make sure that you not run Firefox in (permanent) [[Private Browsing]] mode
* You enter Private Browsing mode if you select: Tools > Options > Privacy > History: Firefox will: "Never Remember History"
* Uncheck: [ ] "Automatically start Firefox in a private browsing session"
* Websites remembering you and automatically log you in is stored in a cookie.
* You need an allow cookie exception (Tools > Options > Privacy > Cookies: Exceptions) to keep that cookie, especially for secure websites and if you let cookies expire when Firefox closes
* Make sure that you do not use [[Clear Recent History]] to clear the "Cookies" and the "Site Preferences"
Clearing "Site Preferences" clears all cookies, images, pop-up windows, software installation, and password exceptions.
See also:
* http://kb.mozillazine.org/Cookies
* [[Enabling and disabling cookies]]

Set up app tabs bi pining when firefox closes and is reopened app tabs have disappeared, Why

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