Safari suddenly collapsed

Hi everyone. For the past few days, the Safari freezes unexpectedly. I can recover it by restarting my PC in safe mode (holding down the power button) and restoring it from Time Machine back up, choosing for example the day before. It ran for about a day but then crashed again. I'm using an iMac M1 and macOS Sequia version 15.1.1 and usually browsing with Safari in private window (no history). Any advice on how I can recover it for good? Thanks for your help.