Delete / Clear Data of 4GB size necessary?

My FireFox data is about 4.2GB - I think I never deleted (clicked the clear data button) since December 2018. Should I do it now ? I don’t know if the slight sluggishness of the FireFox 104.0.2 browser is because of my network issues or the size of the temp data. I fear I may loose auto-fill data or something which I’m not storing in my 1Password account.