https://www.engadget.com/2019/05/03/...n-add-on-cert/

Stay tuned for updates as soon as possible.

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Have you tried with a new profile?

EDIT: And I should've realized there was a second page and that Pat already provided the answer...

Mr. Volkerding was certainly right, and I would like to say him sincere thanks for guiding me on the right path.

However, I was also impressed by two facts.

First one is that my "Laptop in Mini-Tower Case" managed to build the latest Firefox 66.0.3 in several hours, which I think is quite impressive for a 25W CPU even it is quad-core. I should call it APU? In fact it is one of the well-know Kabini system-on-cip for laptops.

The second one is the working performances of Firefox 66.0.3 comparative with the shipped ESR. The first one is perceivable faster, many sites looks better and they work better. So, for now I will stick with that 66.x even that imply building it myself.

And this adventure made me to remember that at a Linux conference where I was several months ago, a Firefox evangelist on his speech insisted that we, the Firefox users, we should use always the latest stable release, both on Windows and Linux, and those ESR releases are not for us, but for businesses, where they should rely on certain browser features for long term, for their Intranet sites.

I remember that this Firefox evangelist even done the comparation with AMDGPU-PRO which is considered exclusively for businesses, and the open-source AMDGPU which is for users and gamers on Linux.

Hi there,

Came here looking for possible answer to a different issue, and saw an identical symptom.
@LuckyCyborg : see this by mozilla. They did something to deactivate most add-ons and now they try to fix it. Their temporary solution involves a feature (studies) which seems to be off by default in the slackware build, reasonably so most probably. See also here for updates. This might need a separate thread.

On my computers, Firefox returned alone to normal working, with no configuration changes from my part (but never I touched it anyways), and that happened on all my instances.

The -current shipped 60.x ESR done that.
The repackaged 66.x binary done that.
The custom built by myself 66.x done that.

So, like Mr. Volkerding said, they did something as fast was possible, to fix the issue.

I'm not convinced that it's fixed yet. One of my machines just lost plugins for the first time a few minutes ago. There are a couple of patches in hg that address the expired cert by checking the signature using the date 2019-04-27... clearly a temporary measure until they can get a new cert out and add-ons re-signed. But there's no ETA on source tarballs yet.

Regarding latest vs. ESR -- my opinion is that ESR makes more sense in a distribution that needs to issue security patches. Otherwise it's more likely that security patches will require new dependencies, new compilers, node.js, etc.

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I also had to set (about:config):

extensions.legacy.enabled;true
extensions.legacy.exceptions; ← Set to null string.

I chose to go back to firefox 58FPA because of the addons problem that at first I thought was an ESR issue. I found 58FPA had similar issues but restored some settings I'd lost in ESR and had to do the "about:config npinstal false" fix but so far I can't return it to "true" or it reverts to dumping most addons into "Unsupported". So in a day or two I'm going to again give ESR a go.

Great, it was the case for me too, and I don't understand how it was auto-fixed. Another user warned me about your experience.

Probably it called home and downloaded some kind of patch.

I would like to note that I use no customization of its settings, excluding: always asking where to download files.

Since I do adjust settings including rejecting allowing for automatic updates of any kind, I would very much like to know if such a thing is still possible that goes against my precise instructions and desires. If it is does actually exist and is impossible to turn this off, and I mean any instance of it, I will drop Firefox and any other browser that not only can "phone home" but download AND install anything I don't give permission for. This is actually my most pressing concern for forced updates where many older browsers and browser versions have been rendered useless at even the most cursory of online access on any operating system. That could easily become very disturbing if it is so.

The constant stream of new subsystems added to and removed from Firefox, as well as Mozilla's propensity for giving them meaningless internal codenames, means it's quite difficult to track them down. The subsystems that will interest you are Shield (a "user studies", i.e. telemetry, platform) and Normandy (a "preference rollout", i.e. remote reconfiguration, mechanism). They appear to have a symbiotic relationship.

In a fit of irony, note that it's impossible to stop Firefox phoning home to Mozilla to tell them you have telemetry disabled if you're using an official Mozilla build.

Always I love a healthy dose of paranoia, but living half of my life in a paranoid State made me to consider the paranoia and the paranoiacs with a bit of salt.

Like said someone else, anyways nobody force you to use the Firefox at a gun's blank point.

Then, we can have a thread about building Firefox, please?

If I had to use it, I'd just find with tcpdump what cdn it tries to call, and filter output to entire IP range of that cdn.
Sure there's always some collateral making things difficult, but it's definitely possible (regardless of what ghacks has to say about it).

We each entertain our own levels of security as sufficient but I although I leave my car unlocked at my rural home, I lock it in urban areas. It doesn't get any more "urban" than online, so I try to be "stitch in time" cautious, not quite paranoid... just prudent.

Agreed!.. which is why I'm looking now for a replacement. My upset about it comes strictly from an exceptionally long term reliance on Firefox and Mozilla's philosophies.... well, that and the fact that I donated again during the last year when shortly after their philosophy apparently shifted away from mutual interest in my case.

Being a creature of habit, I'd like that, too, if only to see better what options are realistically possible.