Safari quitting unexpectedly

Go step by step and test.

1. Force Quit Safari, launch Safari holding the Shift key down.

    How to force an app to quit on your Mac - Apple Support

    About pop-up ads and windows in Safari - Apple Support

2. Startup in Safe Mode. 

   Start up your Mac in safe mode - Apple Support.  

    Quote:

    It also does a basic check of your startup disk, similar to using First Aid in Disk Utility. 

    And it deletes some system caches, including font caches and 

    the kernel cache, which are automatically created again as needed.

3. Clear History

    Clear your browsing history in Safari on Mac - Apple Support

    Please read the article before clearing history, 

    this is like a low level resetting of Safari without affecting passwords and bookmarks.

4. If Safari doesn't open a webpage or isn’t working as expected

    If Safari on Mac doesn't open a webpage or isn’t working as expected - Apple Support

5. If Safari says “Safari Quit Unexpectedly”:

    If an app freezes or quits unexpectedly on Mac - Apple Support

     Download EtreCheck: https://etrecheck.com/maspro ,run it and post the report here.

     Click  “Click to download” button,    

     Open Downloads folder, click on it to open, and then select ”Open”.

     “Choose a problem” from the popup menu box, and then “Start EtreCheck” in the dialog.

     Click “Share Report” button in the toolbar, select “Copy report” .

     Paste the report when you reply.

From the report:

Runtime: 5:19

Performance: Below Average

Space is very low.

2022-05-13 21:37:36 Mendeley Reference Manager.app Crash

Executable: /private/var/folders/*/Mendeley Reference Manager.app

Details:

*** Terminating app due to uncaught exception 'NSInternalInconsistency

Exception', reason: 'BUG IN RUNNINGBOARD 1000 RunningBoard handshakes

failed'

terminating with uncaught exception of type NSException

abort() called

I believe this is not Safari.

Please contact Mendeley software.

Meanwhile you can download Safari Technology Preview to finish your research.

Safari Technology Preview - Safari - Apple Developer

https://guides.libraries.indiana.edu/mendeley/troubleshooting

Please try the suggestions made in this article.

If your Mac runs slowly - Apple Support