How to Fix: Firefox and Thunderbird keep crashing after updating to MacOS Tahoe 26.5
Firefox and Thunderbird crashing after MacOS update, frequent crashes every 15 minutes.
📋 Table of Contents
Firefox and Thunderbird keep crashing after updating to MacOS Tahoe 26.5 due to a known issue where the WebKit engine is not compatible with the latest version of the browsers. This incompatibility causes crashes every 15 minutes or so, resulting in frequent failures.
⚠️ Common Causes
- Outdated WebKit engine compatibility
- Insufficient system resources (RAM or CPU)
- Conflicting browser extensions
🛠️ Step-by-Step Verified Fixes
Method 1: Update to Latest Firefox and Thunderbird Versions
- Step 1: Open Firefox and Thunderbird, and click on the three dots in the top right corner of each window.
- Step 2: Select 'Help' > 'About' to check for updates.
- Step 3: Install any available updates and restart both browsers.
Method 2: Disable Conflicting Browser Extensions
- Step 1: Open Firefox and go to the 'Add-ons' page.
- Step 2: Disable any recently installed or suspicious extensions.
- Step 3: Restart Firefox and try using Thunderbird again.
Method 3: Increase System Resources
- Step 1: Open the Activity Monitor in MacOS.
- Step 2: Find and select both Firefox and Thunderbird processes.
- Step 3: Increase the 'Memory' and 'CPU' allocations for each process to at least 512 MB and 10% respectively.
💡 Conclusion
By following these steps, you should be able to resolve the crashing issue with Firefox and Thunderbird on MacOS Tahoe 26.5.
❓ Frequently Asked Questions
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