I've been using Firefox Portable for a while now and have not experienced any kind of error until yesterday.
since i Updated My Portable Firefox to the latest Version (27.0.1), when i click on Firefox Logo to RUN it, Showing This Error >
"Could not initialize the application's security component. The most likely cause is problems with files in your application's profile directory. Please check that this directory has no read/write restrictions and your hard disk is not full or close to full. It is recommended that you exit the application and fix the problem. If you continue to use this session, you might see incorrect application behavior when accessing security features."
and after closing this Popup, when the window opens, i found most of my add-ons are missing and I am unable to see my saved Passwords but Bookmarks are OK.
I'm Using FxP from Portable Apps Platform 11 and its saved on my PC's HDD.. Every Other Applications from Platform is functioning normally Except FxP. Even i updated my default PC Firefox to the latest version and its working Fine.
There is a Huge Space Available on that Drive and File Permissions seems OK.
So How Can i Fix This Error ? Is that a Security Flaw of this Portable Version of Firefox or anything else ?
I'm Waiting for Experts Reply.
Thank You 
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This error is nearly always caused by drive corruption. It can also be caused by a malfunctioning antivirus. I'd suggest scanning the drive for errors, updating your antivirus, then re-installing Firefox Portable over itself (everything important is preserved).
Sometimes, the impossible can become possible, if you're awesome!
* I Scanned My entire PC two times.
* I CheckedMy Antivirus for an Update, but i found i'm using Latest Version of it (Webroot SecurityAnywhere)
* I unstalled my FxP and Downloaded it again, but Result is Same...
But I Found a solution of this,
I Downloaded an earliar version of Firefox from SOURCEFORGE (latest is 27.0.1, but I downloaded 27.0). than i added it on my Portable Platform with "Install a New APP" option.. Now it Working Fine
So I think There is a Problem in Latest Firefox Portable Version, it would be great if you check about this and if there is an error you can fix that for upcoming version!
Thanks a lot
The current version is 27.0.1 and works just fine here (English Firefox, Windows 7 x64). What language and operating system are you using?
Keep in mind that we make no changes to Firefox within Firefox Portable at all and if the build itself was broken, we'd hear from the millions of people using it. And that you should not be using 27.0 anymore as 27.0.1 has some security fixes in addition to updates to the security component. So, we need to figure out what on your specific configuration is interfering with it so you can upgrade and not be vulnerable.
Our next step would be to try running it with your antivirus off. You can scan the whole thing first to be sure it's safe. This should eliminate your antivirus as a possibility.
After that, try a fresh install of Firefox Portable. Just installing it temporarily to your Desktop directory is fine. If this works, then it's something in your configuration interfering. If it fails, we'll know it's something else.
Sometimes, the impossible can become possible, if you're awesome!
Sorry for late Reply!
I've Tried Everything You Said.. but result is same :/
i think, i should wait till releasing next firefox version.. if that works than very good or i've to continue with version version 27.0
Thanks a lot !
What language and operating system are you using?
Sometimes, the impossible can become possible, if you're awesome!