Can you try setting layers.acceleration.disabled to true in the about:config page and report back? A Firefox restart in required.

If this doesn’t help, create a new profile using the about:profiles page as a test, set that as default, and restart Firefox (you can switch the default profile back later).

Thanks for your suggestions.

I deleted all versions of Firefox and did a clean installation of 57. Verified problem still present. Set layers.accelleration.disabled to true - problem still present. Set webgl.disabled to true. Problem still present. Verified Use HW accelerator not ticked and process limit set to 1. Still fails. Created a new profile as requested. No difference.

Further suggestion welcome.

Hello, it seems to be a technical issue where only developers can help. I suggest creating a technical ticket on http://bugzilla.mozilla.org/

Thank you. I will do so.

one more thing that i have just noticed when looking at your system details - can you please test if the following steps can fix the performance issue you're seeing in firefox 57?: enter about:config into the firefox address bar (confirm the info message in case it shows up) & search for the preference named accessibility.force_disabled. double-click it, change its value to 1 and restart firefox once.

then please let us know how this goes?

smorele said

Hello, it seems to be a technical issue where only developers can help. I suggest creating a technical ticket on http://bugzilla.mozilla.org/

Though Bugzilla is not really a place for support or discussion like a forum but for reporting and tracking things.

https://developer.mozilla.org/en-US/docs/Mozilla/QA/Bug_writing_guidelines

Hi,

I followed the advice to try: "enter about:config into the firefox address bar (confirm the info message in case it shows up) & search for the preference named accessibility.force_disabled. double-click it, change its value to 1 and restart firefox once."

I don't know why but it seems to have resolved the problem, thank you.