Fx 54 Ubuntu 14.04 – Ubuntu Modifications not installing

User Help for Mozilla Firefox

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Post Posted August 25th, 2017, 2:27 pm

(N.B. I have already asked the following question at Having gotten no response, I thought I would try here.)

I recently downloaded and installed the new Ubuntu Modifications to Firefox, by upgrading `xul-ext-ubufox` to `3.4-0ubuntu0.14.04.1`.

I can confirm that the package did upgrade to the latest version:

$ apt-cache policy xul-ext-ubufox
Installed: 3.4-0ubuntu0.14.04.1
Candidate: 3.4-0ubuntu0.14.04.1
Version table:
*** 3.4-0ubuntu0.14.04.1 0
500 trusty-updates/main amd64 Packages
500 trusty-security/main amd64 Packages
100 /var/lib/dpkg/status
2.8-0ubuntu1 0
500 trusty/main amd64 Packages
500 trusty/main amd64 Packages

When I opened Firefox 54 (I have not upgraded to 55 yet), I saw that the Ubuntu Modifications are still at 3.2 rather than 3.4:


It gets weirder because I also have Firefox 52 ESR installed, and the Ubuntu Modifications in that one *did* update correctly:

**So now, I cannot figure out how to get Ubuntu Modifications to update in my Fx 54 installation. Does anyone know how to fix this?** (Or why they updated in one and not the other?)

When I create a new profile in Firefox 54, that new profile has the correct `ubufox` version. Old profiles also have correct version of Ubuntu Modifications. It is only the file I was using at the time I did the updates that remains stubbornly at version 3.2

At the time I performed the upgrade with Software Updater, I had Ubuntu Modifications disabled in Fx 54 and enabled in Fx 52 ESR. I do not know whether this matters.

I already tried removing the package (with Synaptic) and reinstalling it while Ubuntu Mods was active in Fx 54. No change. I also did a manual purge and re-install (`sudo apt-get install --purge --reinstall xul-ext-ubufox`). No change. Version 3.2 is still in Fx 54, and [it is still disabling multiprocessing (no e10s)]( ... g/16978901). I would like to upgrade Ubuntu Modifications to version 3.4 because it is a [security fix](

In case it is of any use, here is where I could find ubufox in my system:

$ locate ubufox
/usr/share/mozilla/extensions/{ec8030f7 ...


Firefox 54.0 (64-bit) for Ubuntu, Canonical 1.0 (54.0+build3-0ubuntu0.14.04.1)
Ubuntu 14.04.5


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Post Posted August 25th, 2017, 8:35 pm

Moving to Firefos Support.

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Post Posted August 25th, 2017, 11:26 pm

Why do you need xul-ext-ubufox? In any case it'll be useless come Fx57.


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Post Posted August 26th, 2017, 5:58 am

To make sure you removed Ubufox entirely - Open nautilus using either gksudo or sudo and open /usr/lib/firefox and /usr/lib/firefox add-ons and see if there's a folder for Ubufox.
Ubufox had some issues which caused a lot of users to dump it.
Also check your /home/username/ Mozilla folder and profile folders plus /home/username/cache for anything there.
I've been running without Ubufox since they came out with it. It's just not that much of a help.
Cashless society sacrifices independence, privacy and lastly liberty, encouraged by ignorance and villainy.


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Post Posted August 26th, 2017, 6:35 am

flaneurb wrote: In any case it'll be useless come Fx57.

Always has been, remove with extreme prejudice.. :P

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Post Posted August 26th, 2017, 6:41 am

Grumpus wrote:... gksudo or sudo ...

I like
Code: Select all
sudo -H
to open GUI-applications on the very rare occasions that I do need to do so.

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