Firefox Portable

I've had some problems on a couple of my systems running Portable FF, in which profiles apparently got corrupted. The major symptoms included incomplete display of page elements on certain web pages, limited or selective functioning of Javascript (worked on some websites, though not on others), inability to sign in to webmail-based email accounts. Trying to troubleshoot this proved tedious and not very productive. As a temporary workaround, I used this

https://addons.mozilla.org/en-US/firefox/addon/profilistportable/?src=api

I posted the following message about an apparent bug also in the "Mozillazine Forum" ( http://forums.mozillazine.org/viewtopic.php?f=9&t=2910125 ); but I have yet to find a solution:

To Reproduce
+ Install 38 Alpha x86 from here https://portableapps.com/apps/internet/firefox_portable/test
+ open browser
+ set Options > General > When Firefox starts: Show my windows and tabs from last time
+ load at least one website
+ restart browser

Results
Tabs from the previous session are appear as empty "New Tabs".

Is it possible to start the second firefox profile along with the main profile? I set AllowMultipleInstances for main and second profile to true, but when i start firefox and then try to start the second profile it still shows that another instances of firefox is running.

I have created a backup of my Firefox browser, using MozBackup 1.5.1. Previously, I have used this several times and transferred the copied browser to every new laptop and desktop I own - Without a single problem.

Some years ago I used MozBackup to copy by browser to my portable application of Firefox. I wish I could remember exactly how I did as I am struggling now. The problem I am encountering is, which destination folder do I choose in the portable version of Firefox to install the backup?

So far I have selected: Firefox portable > App > Default Data > Profile.

After automatic upgrading to Firefox 35 today autofill of username and passwords no longer works. No problems until the upgrade. Problem occurs in safe mode also. I would hate to have to do a fresh install so any suggestions are welcome.

HI.
How I add a command line parameter when start Firefox? I want add a "-no-remote" parameter.
Thank's.

Was using Firefox Portable the other day and my sessions got screwed up so I decided to delete all the files and install the latest version fresh. Most of the https sites I went to gave me the error: sec_error_bad_signature, which I found out was something to do with certification validation. I read more on it and turns out that turning off https scanning in Avast solved my problem, but I'm not sure if this is a safe solution or something that is a bug by Firefox.

When I went into Help>About> the other day, I noticed my portable Firefox was outdated (said 34.0.0, not 34.0.5) and it said that my Firefox was up to date, which I knew was incorrect. I know the .5 release included a critical fix for a vulnerability that was found... so it's kinda scary I was going a few days without. I tried it a few more times, had no luck finding an update through this so I manually updated through portableapps.com...

After installation the size of the FirefoxPortable.exe is 211kb. When it has been in use for some time, the size grows up to 290kb until it won't open anymore and an error pops up accusing an improper configuration. I make renamed copies of the original exe and replace the corrupt one from time to time. Does anyone have an explanation what is happening here?

Thanks Alexander