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How can I prevent video ads from automatically playing?

Posted

I have been leaving the following site open during inclement weather while doing other things (spreadsheets, documents, financial programs, etc.) to periodically check weather quickly.

http://www.wunderground.com/cgi-bin/findweather/getForecast?query=30340

Lately, there have been video advertisements on this site that will automatically play with sound that are obnoxious and distracting. I would like to prevent these. The webmaster for the site claims that they do not allow these ads and yet, I get them. He says they cannot replicate the issue and suspect its a problem with my settings. I do not know if the same thing happens with advertisements on other sites or not.

On a related note, is there a way to prevent "roll over" ads from playing?

Chosen solution

Thank you Phillip and Cor-el for your advice. Since the problem only bothers me on my work computer I cannot use your solutions so I am simply avoiding the website in question.

Read this answer in context 1

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.7 r700
  • Next Generation Java Plug-in 10.17.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • GEPlugin
  • Google Update
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  • Npdsplay dll
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Application

  • Firefox 20.0.1
  • User Agent: Mozilla/5.0 (Windows NT 5.1; rv:20.0) Gecko/20100101 Firefox/20.0
  • Support URL: http://support.mozilla.org/1/firefox/20.0.1/WINNT/en-US/

Extensions

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  • LastPass 2.0.20 (support@lastpass.com)
  • Troubleshooter 1.1a (troubleshooter@mozilla.org)
  • Microsoft .NET Framework Assistant 1.2.1 ({20a82645-c095-46ed-80e3-08825760534b}) (Inactive)

Javascript

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Graphics

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Modified Preferences

  • accessibility.typeaheadfind.flashBar: 0
  • browser.cache.disk.capacity: 358400
  • browser.cache.disk.smart_size.first_run: False
  • browser.cache.disk.smart_size.use_old_max: False
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  • browser.startup.homepage: http://www.digitel.net/
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Misc

  • User JS: No
  • Accessibility: No
philipp
  • Top 10 Contributor
  • Moderator
2042 solutions 8887 answers

Helpful Reply

hello, one way would be to set all plugin content (like flash which is likely used for those ads) to click-to-play, which means it will only be active once you explicitly enable it on each site. therefore you'd have to enter about:config into the firefox location bar (confirm the info message in case it shows up) & search for the preference named plugins.click_to_play. double-click it and change its value to true.

another way would be to make use of an addon like adblock plus with a good filter-list to generally block advertisements on the web: https://addons.mozilla.org/firefox/addon/adblock-plus

cor-el
  • Top 10 Contributor
  • Moderator
10740 solutions 96657 answers

Helpful Reply

See also:

Chosen Solution

Thank you Phillip and Cor-el for your advice. Since the problem only bothers me on my work computer I cannot use your solutions so I am simply avoiding the website in question.