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Accidentally clicked on Don't Show Again to Mozilla Firefox Seems Slow error message -- how can I undo that?

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truthmail
truthmail

I received a Mozilla Firefox Seems Slow error message when I opened the browser, and instead of clicking on Show Me What To Do, I accidentally clicked on Don't Show Again. How can I undo this (meaning, if I were to get the error next time, I want to be able to click on Show Me What To Do)? Thank you

I received a Mozilla Firefox Seems Slow error message when I opened the browser, and instead of clicking on Show Me What To Do, I accidentally clicked on Don't Show Again. How can I undo this (meaning, if I were to get the error next time, I want to be able to click on Show Me What To Do)? Thank you

Réiteach roghnaithe

If you are referring to the "Firefox seems slow… to… start" message, try this:

  1. Open about:config in your address bar, press Enter and accept the risk.
  2. In the Search field, type browser.slowStartup.notificationDisabled or a part of it.
  3. Look at the value of the preference - it’s likely set to true. Highlight the entry, right-click and select Toggle or Reset to set it to false.

The warning should be displayed again next time the browser starts to slow down under similar circumstances.

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Tonnes
Tonnes

Réiteach Roghnaithe

If you are referring to the "Firefox seems slow… to… start" message, try this:

  1. Open about:config in your address bar, press Enter and accept the risk.
  2. In the Search field, type browser.slowStartup.notificationDisabled or a part of it.
  3. Look at the value of the preference - it’s likely set to true. Highlight the entry, right-click and select Toggle or Reset to set it to false.

The warning should be displayed again next time the browser starts to slow down under similar circumstances.

cor-el
cor-el
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  • Top 10 Contributor

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Appearance
  • do NOT click the "Refresh Firefox" button on the Safe Mode start window

If you use Adblock Plus then you can consider uBlock Origin as a replacement to see if that works better (lower memory footprint).