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

搜尋 Mozilla 技術支援網站

防止技術支援詐騙。我們絕對不會要求您撥打電話或發送簡訊,或是提供個人資訊。請用「回報濫用」功能回報可疑的行為。

了解更多

Firefox becomes slow and unresponsive when processing large files on certain websites

  • 無回覆
  • 0 有這個問題

Hi everyone,

I’ve been experiencing performance issues while using Mozilla Firefox, especially when working with browser-based tools that handle file processing.

When I try to upload or process larger files (like PDFs), I notice the following:

• Firefox becomes slow or laggy • The tab sometimes freezes temporarily • File processing either takes too long or doesn’t complete • Occasionally I get a “page unresponsive” message

For testing, I used an online tool: [ONLINE EDITOR]

The issue seems more noticeable with larger files or when multiple tabs are open.

What I’ve tried:

• Restarting Firefox • Clearing cache and cookies • Disabling extensions • Testing in Troubleshoot Mode • Updating Firefox to the latest version

The same tasks seem to work slightly better in other browsers, so I’m wondering if this is related to Firefox performance or settings.

Question:

Is there any way to improve Firefox performance for heavy browser-based tasks like file processing? Are there specific settings I should adjust?

Thanks in advance!

Hi everyone, I’ve been experiencing performance issues while using Mozilla Firefox, especially when working with browser-based tools that handle file processing. When I try to upload or process larger files (like PDFs), I notice the following: • Firefox becomes slow or laggy • The tab sometimes freezes temporarily • File processing either takes too long or doesn’t complete • Occasionally I get a “page unresponsive” message For testing, I used an online tool: [[https://pdfonlineeditor.com/|PDF ONLINE EDITOR]] The issue seems more noticeable with larger files or when multiple tabs are open. What I’ve tried: • Restarting Firefox • Clearing cache and cookies • Disabling extensions • Testing in Troubleshoot Mode • Updating Firefox to the latest version The same tasks seem to work slightly better in other browsers, so I’m wondering if this is related to Firefox performance or settings. Question: Is there any way to improve Firefox performance for heavy browser-based tasks like file processing? Are there specific settings I should adjust? Thanks in advance!

如果您還沒有帳號,您必須先登入帳號 來回覆文章。還沒有帳號的話,只能發問新問題