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Firefox Portable

fix for over sized menu spacing

Submitted by rocket888 on April 6, 2022 - 2:37am

I briefly updated to the lastest version v99 or so (but made a snapshot first, and then restored after the problem described below). I'm back to running v 90.0.2 and everything is fine, I think I had to fix this once before but can't recall.

Anyway, the issue is the huge amount of spacing in the menus for the bookmark folders.

I read somewhere you can change something in file C:\Users\XXX\AppData\Roaming\Mozilla\Firefox\Profiles\XXX.default-release\chrome\userChrome.css and copy the below lines at the top.

Firefox portable won't start anymore.

Submitted by sarapixit on April 2, 2022 - 7:17am

I have this problem.
Firefox portable won't start anymore.
I have tried different versions.
I have tried installing and uninstalling firefox, but it doesn't work.

It doesn't show up in the list of running apps, so I can't terminate it.

I tried manually cleaning the windows10 registry, deleted dozens of entries and it only worked once.
On the next attempt, it won't start again.

There must be something in the windows registry blocking it, but I don't know what.

Can you tell me how to fix it?


FirefoxPortable.exe process is terminated while updater.exe is still running

Submitted by ner0 on March 13, 2022 - 8:07pm

Today I noticed an unexpected behavior in Firefox Portable.
If I have the pref "app.update.staging.enabled" set to false, FirefoxPortable.exe is terminated while updater.exe is still running.

The pref description: "If set to true, the Update Service will apply updates in the background when it finishes downloading them."
So, the updates are applied in the background while firefox is still running (true). Otherwise, they are applied when you restart firefox (false).

Incomplete / cancelled update

Submitted by DrJohnson on February 21, 2022 - 10:57pm

I run Firefox Portable on a computer that also has a normal Firefox installation. Earlier today, Firefox Portable started updating itself automatically, but I cancelled the update before it finished. Then, when I went to Settings > Firefox updates > Show update history, it was telling me that there was an update with an "install pending". So I deleted the Firefox Portable folder and installed it again, but the new installation is still telling me that there is a pending update. I can tell it's the same as before from the timestamp.

Firefox portable (only) does not recognize valid certificate

Submitted by andrixnet on February 21, 2022 - 3:58am

I discovered an issue with the website of a utility provider:
In Firefox Portable it does not work with error SEC_ERROR_UNKNOWN_ISSUER.

My Portable Firefox was deployed as 87, updated through Firefox's mechanism to current latest.
Tested on 3 different deployments of Firefox Portable, each originating from different versions initially, updated through Firefox's mechanism to current latest.

Certificate is issued by "GeoTrust EV RSA CA 2018" (from DigiCert Inc).