Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Søg i 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.

Læs mere

Firefox becomes very slow or stops responding when viewing shop drawings

I run a drafting site where we share shop drawings for contractors and architects: https://usadraftsman.com

Whenever I open these drawing preview pages in Firefox, the browser gets slow or sometimes becomes unresponsive. The same pages load completely fine in Chrome, so I’m trying to understand what might be causing this only in Firefox.

Most of the previews are large drawings or viewer embeds, so maybe Firefox is struggling with rendering them. I tried clearing cache and turning off extensions, but the issue still comes back.

If anyone has dealt with similar heavy graphics or rendering issues in Firefox, what should I check or adjust? Any suggestions would be appreciated.

I run a drafting site where we share shop drawings for contractors and architects: https://usadraftsman.com Whenever I open these drawing preview pages in Firefox, the browser gets slow or sometimes becomes unresponsive. The same pages load completely fine in Chrome, so I’m trying to understand what might be causing this only in Firefox. Most of the previews are large drawings or viewer embeds, so maybe Firefox is struggling with rendering them. I tried clearing cache and turning off extensions, but the issue still comes back. If anyone has dealt with similar heavy graphics or rendering issues in Firefox, what should I check or adjust? Any suggestions would be appreciated.

Ændret af William Smith den

Valgt løsning

What version of Firefox? What security software besides MS Defender are you running? Windows home or pro? If you're running Windows Pro version, I would test in Windows Sandbox to confirm. https://www.howtogeek.com/399290/how-to-use-windows-10s-new-sandbox-to-safely-test-apps/

The site doesn't allow me to access any samples. Hard to help with something we cannot see or replicate. Show your system specs by posting a screenshot of the performance tab in Task manager.

Here's a little research on rendering.

https://browserbench.org/

Læs dette svar i sammenhæng 👍 0

Alle svar (2)

Valgt løsning

What version of Firefox? What security software besides MS Defender are you running? Windows home or pro? If you're running Windows Pro version, I would test in Windows Sandbox to confirm. https://www.howtogeek.com/399290/how-to-use-windows-10s-new-sandbox-to-safely-test-apps/

The site doesn't allow me to access any samples. Hard to help with something we cannot see or replicate. Show your system specs by posting a screenshot of the performance tab in Task manager.

Here's a little research on rendering.

https://browserbench.org/

Ændret af jonzn4SUSE den

jonzn4SUSE said

What version of Firefox? What security software besides MS Defender are you running?

Thanks for jumping in. Here are the details you asked for:

1)Firefox version: latest stable (updated this week) 2)Windows: Home 3)Security: just Microsoft Defender, nothing additional running in the background

The slowdown happens specifically on pages with heavier drawing previews or viewer embeds. Chrome handles them fine, but Firefox becomes sluggish when the viewer initializes. Even with extensions disabled and cache cleared, the issue returns.

Regarding samples: the site doesn't give open access to files unless a preview is generated from a specific project. That’s why you couldn’t open anything directly. If needed, I can set up a temporary public sample page so it’s easier to test on your side.

Before I do that, is there anything specific you’d want enabled/disabled on the sample (e.g., embedded PDF, SVG viewer, or raw image preview)? That way I can make sure the test page actually helps diagnose the issue.

Stil et spørgsmål

Du skal logge ind på din konto for at svare på et indlæg. Start et nyt spørgsmål, hvis du ikke har en konto endnu.