Re: Firefox 31.8.0: Use of Add-On "HTTPS Everywhere 5.1.2" causes 99% CPU utilization

On 02/14/16 03:39 AM, Lars Erdmann wrote:
> Hallo,
>
> this issue has been mentioned already quite often:
> after starting the application Firefox becomes completely unresponsive
> for timespans of say 10 seconds. Then it continues on until the same
> happens again. When it becomes unresponsive, one of the CPU cores will
> show 99% of usage, if you only have/use one core then of course that
> core will show 99% of usage.
>
> As this is really frustrating, I disabled all add-ons and restarted
> Firefox again and again, each time with one additional add-on reenabled.
>
> It now turns out that "HTTPS Everywhere 5.1.2" is the culprit.
> If I have it disabled, I don't see this issue, if I enable it, I run
> into the above mentioned problem. This is even true if an "internal"
> webpage like about:addons is displayed in Firefox.

I've installed HTTPS Everywhere 5.1.2 and so far don't see the 100% CPU 
issue.
It is known that different add-ons can bring out bugs in the browser, 
often due to interactions between different add-ons, profile problems etc.
Have you tried to create a new profile and only install HTTPS Everywhere?

>
> Now, I don't blame Firefox for this error but we would need to find out
> how an add-on executes within the Firefox application process and we
> would need to think about how an add-on can be prevented from
> monopolizing the whole application process.
> I don't know if this problem is OS/2 specific but I fear that it is.

It may only be specific to your setup, I'll keep testing
Dave