I'm a regular Firefox and Fedora user, and I use stable firefox from fedora's repo and the nightly, both are running fast here. Once, like 2 versions ago, firefox used to be very slow, but that's not a problem now.

Em qua, 11 de out de 2017 às 06:44, Ahmad Samir <ahmadsamir3891@gmail.com> escreveu:
On 11 October 2017 at 06:12, Robert Lu <robberphex@gmail.com> wrote:
> Hi, I think there is some reason:
>
> 1. your connection is very slow.
> you can try to test your network speed, such as fast.com
>
> 2. your firefox have internal bug.
> well, you can open developer tools, and watch the request timing tab. it can
> check which part of request is slow. such as DNS time, send time, wait time.
>
> 3. your firefox's UI is not reponse
> You can try resize firefox window size while you wait loading. if layout is
> normal, the UI is OK.
>
> All in all,
> we need your more diagnostic information。
>

I use firefox and I don't see any particular slowness of late.

I would add to the above list trying with a new firefox profile; you can:
- close firefox then rename ~/.mozilla and start firefox again
- close firefox, take a backup of ~/.mozilla then start firefox, go to
about:support and 'refresh firefox'

--
Ahmad Samir
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