hi jonah, please see if the following step can fix this: go to the firefox menu ≡ > options > privacy & security panel and under permissions check the setting to prevent accessibility services from accessing your browser.

Thanks, Philipp. I have just now switched on this setting. Let me see whether the Firefox still crashes tomolo morning.

What kinda charts and windows are those?

We tile several Firefox windows across two monitors. They comprise of DIVs, PNGs, web maps, jpegs and text. The attached photo shows how they are arranged.

So what GPU are you using and is the GPU software up to date? What it sounds like is GPU issues that is causing the Browser to crash. I don't have the setup you do but have chrome and firefox browser loaded with more then one tab and left over night not running your type of software setup and neither browser crashes. I seriously think something else is causing the crash and the Browser is something that is more obvious then the other factor causing the problem. I would say run a limited window in each display and let it sit and see what happens.

Do you have any recent crash reports?

The first report in the list crashed Nov 2018 Firefox 63.0.3 Crash Report [@ mozilla::a11y::IDSet::GetID ]

• bp-c5d9f2c2-5bc6-41de-bddd-7c0200190118
• CrashTime : Fri, 30 Nov 2018 22:08:27 GMT

The last report in the list crashed Dec 2018 Firefox 63.0.3 Crash Report [@ mozilla::a11y::IDSet::GetID ]

• bp-9b50ee2f-401b-4d5b-accf-578230181206
• CrashTime : Wed, 05 Dec 2018 09:41:08 GMT

Surprise, surprise!

I had expected to come in to office this morning and be able to take some new crash reports. But none of the Firefox windows have crashed since yesterday.

Let me continue to monitor this tomolo and for the next few days, and then take some more crash reports if there are crashes.

To answer WestEnd's question, we have two identical graphics cards on this system. They are AMD FirePro SDI Matrox C680 PCIe x 16, and the driver is version 22.19.693.256. I attach a photo in case I left out any details.

Thanks, Jonah.

That screenshot shows a driver date from 2017. That is very old for a display driver.

Aren't there any updates available?

• https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

Okay, let me try to upgrade the graphics driver if Firefox crashes in the next few days.

the crash is the same issue as https://bugzilla.mozilla.org/show_bug.cgi?id=1368270 so the gpu shouldn't play into that...

I am very happy to come in to office today to see that Firefox did not crash.

I think it is very likely that Philipp's initial answer that suggested to "prevent accessibility services from accessing your browser" successfully solved the problem.

Thank you very much, Philipp, WestEnd and Cor-el, for helping me.

hi again jonahyongntu, the developers looking into this bug would be interested in the inner working of the page that triggered the crashes reliably - would you be able to answer the question at https://bugzilla.mozilla.org/show_bug.cgi?id=1368270#c28 ? thanks a bunch

Hi everyone,

I received an email from philipp that you had interest in what caused the daily crash in my Firefox.

I really do not know which "browser window/tab" caused the crashes, if any. We have as many as 10 tabs/windows running 24/7. I had given a photo of what they look like here: https://support.mozilla.org/en-US/questions/1247107

All I know is that the solution was to activate the "prevent accessibility services from accessing your browser" setting. I do not really understand what this setting does. There have been no more crashes after activating this setting. So, it's kind of like a "magic button" to me (press the magic button and the problem is solved). But all my tabs continue to function as usual and are not affected by this setting.

I would be happy to provide more information, but I think I may need some guidance on what information to provide.

Thanks for helping to solve my daily crash.

Thanks, Jonah. +65-98350243