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

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!