Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Disabling javascript alerts?

  • 8 replies
  • 2 have this problem
  • 152 views
  • Last reply by LostGod

LostGod
LostGod
more options

I am using an extension called Black YouTube Theme (https://addons.mozilla.org/en-US/firefox/addon/black-youtube-theme/). Currently Whenever I start Firefox using restore session from last time. For any YouTube links I have open it pops open a little JavaScript Application box, one per link, which returns "Error: document.domain is null". That is the only problem I have, so I was wondering does anyone know how to disable JavaScript error messages using about:config?

I am using an extension called Black YouTube Theme (https://addons.mozilla.org/en-US/firefox/addon/black-youtube-theme/). Currently Whenever I start Firefox using restore session from last time. For any YouTube links I have open it pops open a little JavaScript Application box, one per link, which returns "Error: document.domain is null". That is the only problem I have, so I was wondering does anyone know how to disable JavaScript error messages using about:config?

Chosen solution

capability.policy prefs aren't supported in current Firefox releases, so you can undo these steps.

If it only happens when you reopen pages automatically on the next start then this is likely caused by Firefox loading pages from the cache.

Read this answer in context 👍 1

All Replies (8)

Diego Victor
Diego Victor
more options

Try this thread on mozillazine:

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Maybe disable the disk cache or clearing the cache on exit (Clear history when Firefox closes) will prevent this alert.

See also:

LostGod
LostGod Question owner
more options

So from my understanding I just put:

"capability.policy.default.Window.alert", "noAccess" "capability.policy.default.Window.confirm", "noAccess" "capability.policy.default.Window.prompt", "noAccess"

As new variables in about:config?

LostGod
LostGod Question owner
more options

forgottengods said

So from my understanding I just put: "capability.policy.default.Window.alert", "noAccess" "capability.policy.default.Window.confirm", "noAccess" "capability.policy.default.Window.prompt", "noAccess" As new variables in about:config?

These didn't work. I still receive 1 JavaScript Application "Error: document.domain is null" for every YouTube page open on restart.

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Chosen Solution

capability.policy prefs aren't supported in current Firefox releases, so you can undo these steps.

If it only happens when you reopen pages automatically on the next start then this is likely caused by Firefox loading pages from the cache.

LostGod
LostGod Question owner
more options

I have disk cache set to 0 and the Boolean variable set to false. So I do not believe it is a cache issue.

finitarry
finitarry
more options

When was capability.policy removed? What next is going to be gutted out? I am really happy I use SeaMonkey.

LostGod
LostGod Question owner
more options

It most likely has been replaced with a different name. I do not believe that they would remove something like that. Options/customization, is the whole reason I use Firefox. Without I might as well use Chrome.