This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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.

Why do 200 radio buttons in a form cause 8 second rendering delay

  • 6 replies
  • 1 has this problem
  • 12 views
  • Last reply by teamtech

teamtech
teamtech
more options

We have an online questionnaire containing 36 questions, each with 6 radio buttons (216 in total) in a single form. Although the page appears to render quickly, there is then a delay in Firefox of up to 8 seconds before it will register a radio button click. This problem does not occur in Chrome or Safari, and there is slight (sub-second) delay in IE. The delay is reduced pro-rata by reducing the number of radio buttons. The delay can also be reduced to about 4 or 5 seconds by removing all elements from the page apart from the radio buttons and form.

We have an online questionnaire containing 36 questions, each with 6 radio buttons (216 in total) in a single form. Although the page appears to render quickly, there is then a delay in Firefox of up to 8 seconds before it will register a radio button click. This problem does not occur in Chrome or Safari, and there is slight (sub-second) delay in IE. The delay is reduced pro-rata by reducing the number of radio buttons. The delay can also be reduced to about 4 or 5 seconds by removing all elements from the page apart from the radio buttons and form.

Modified by teamtech

Chosen solution

Unfortunately, you would have to get with Norton on trying to determine the why.

We could try to open a bug report in Bugzilla... Use the Plugins Product with Norton AV as the component -> https://bugzilla.mozilla.org/enter_bug.cgi?product=Plugins

Read this answer in context 👍 0

All Replies (6)

Tim
Tim
more options

Please provide a public URL or reduced test case that exhibits this issue.

teamtech
teamtech Question owner
more options

Thanks for your reply. The full page is at: http://www.teamtechnology.co.uk/ff1.php

The page with radio buttons only is at: http://www.teamtechnology.co.uk/ff2.php

(I had included a link with the original post but it didn't appear - probably due to my unfamiliarity with the workings of this forum).

Tim
Tim
more options

I get no delay on either page with 3.6.25 or the latest nightly.

Does the issue still occur if you start Firefox in Safe Mode? http://support.mozilla.com/en-US/kb/Safe+Mode

How about with a new, empty profile? http://support.mozilla.com/en-US/kb/Basic%20Troubleshooting#w_8-make-a-new-profile

teamtech
teamtech Question owner
more options

Thanks again for your reply.

The delay doesn't occur in safe mode. After disabling all add-ons and extensions individually, it appears the culprit is Norton Toolbar. I haven't tested this on the other computers where the problem occurred, but they may well have had Norton Toolbar installed as well.

Norton Toolbar is installed on IE but the problem there is sub-second, not 8 seconds. Is this a Firefox-Norton compatibility issue? Is there anything we can do about it, in our page design, without radically altering its usability?

Tim
Tim
more options

Chosen Solution

Unfortunately, you would have to get with Norton on trying to determine the why.

We could try to open a bug report in Bugzilla... Use the Plugins Product with Norton AV as the component -> https://bugzilla.mozilla.org/enter_bug.cgi?product=Plugins

teamtech
teamtech Question owner
more options

Ok, thanks. I'll report it as a bug tomorrow.

Thank you very much for your help, much appreciated.