What is Google Chrome's blob storage and how to clean it?

Today I was doing some disk tidying, and I've found that in my home directory (using Ubuntu 20), there is a .config folder taking almost 10GB, I've narrowed it down to this fella:

/home/someuser/.config/google-chrome/Default/blob_storage containing files between 5MB-7MB all named with just numbers, but there are almost 1400 of them taking almost 8GB, I tried to output one of those files and it seems it contains some sort of site-related structured data.

What are these files? How to clean them/reduce them? (Preferrably without cleaning All browser data...)

1 Answer

The Blob storage is nothing but your browsing history, cookies and other site data, cached image and files, passwords, auto fill form data for your smooth browser experience.

you can simply clean the relevant items in settings -> privacy and security -> select the items to clean up.

I usually clean up cache and cookies mostly as sometimes the css changes wont get reflected due to cached images and data during web development.

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