since updating to v17, I'm getting syntax errors on every site I go to. 2 windows everytime. ok twice and they are gone.
This is the 1st small window that comes up "evalInSandbox:SyntaxError: syntax error" I click "OK" then the next window comes up "syntax error". I click "ok" and it goes away until I go to another web page.
الحل المُختار
I had the exact same errors popping up on every website. I tested every extension and add on on my firefox, and found that it was the SocialFixer app ( version 7.2 ) that was the problem. If you've got that installed, try updating to SF version 7.3. It fixed my issue, maybe it will fix yours!
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This issue can be caused by an extension that isn't working properly.
Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
- Do not click the Reset button on the Safe mode start window or otherwise make changes.
الحل المُختار
I had the exact same errors popping up on every website. I tested every extension and add on on my firefox, and found that it was the SocialFixer app ( version 7.2 ) that was the problem. If you've got that installed, try updating to SF version 7.3. It fixed my issue, maybe it will fix yours!
Sorry I didn't get back in here. "Social Fixer" was the problem. I ungraded it and the problem went away. Thanks for responding Kiraela.