I do this. I just use a password manager that makes logging back in take 2 seconds, so I don’t mind.

I use 4 different browsers and lock down each one depending on task… my general browsing browser is set to wipe every shutdown. The others only ever visit a single site.

I’ve been using cookie autodelete to clean crap from most sites, but whitelisting the ones I don’t want to log back in every time

https://github.com/Cookie-AutoDelete/Cookie-AutoDelete

another advantage is that cookies are cleaned seconds after the last tab on that website is closed

I run my browser in incognito mode. Each launch a script creates a new profile directory specifically for that launch. When I quit the browser it deletes that profile directory.

For every activity, email, a specific search, an online purchase, an issue report, accessing personal information, etc., I’ll launch a separate instance and within that instance I’ll restrict my tabs to only that purpose.

I don’t save passwords or bookmarks, both of which are stored elsewhere.

I’m not particularly worried about tracking by being fingerprinted, I’m much more concerned about data leakage, either inadvertently or maliciously.

Rebooting is an utter pain in the arse, but I put up with it and use the opportunity to clear my slate.

Edit: I don’t create the profile directory manually, it’s a little bash script.

If you’re sharing the computer with others and you don’t delete cookies after having logged in to whatever website/service that you were using, the browser could automatically log another person in with your credentials. This is because cookies can store “sessions”. While I’m not a fan of Linus himself - and I do implore you to make up your own mind on that -, one time, at bandcamp, they almost lost their whole YouTube channel because their session tokens were grabbed, and they made a great breakdown of the incident, which can be educational: https://www.youtube.com/watch?v=yGXaAWbzl5A

I make my browsers either not save cookies at all or delete them on exit by default and manually tweak site settings for specific sites if and when I want to be able to log in “automatically”.

The profile selector for Firefox (I use Librewolf) is a nice way to manage different settings for websites that need to keep browsing data. You can also use containers but I find alt-tabbing more easy to keep track of. Foxyproxy is good for this

Anything that requires PII in a separate browser that doesn’t clear on exit. General browsing on my main browser, which clears data on exit, except for a small list of exceptions. It doesn’t defeat non-cookie fingerprinting, but I at least get rid of all the cookies that I don’t want.

It’s a ton of hassle if you’re logging into websites on that browser and I don’t think it provides much benefit unless it’s a shared computer and user account.

Firefox with uBlock Origin and Enhanced Tracking Protection enabled in strict mode blocks basically every type of tracker. You can add Cookie Auto Delete on top of that if you really want to make sure only sites you whitelist can save anything persistent like cookies or history.

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So Firefox has tab sandbox isolation built in, but its cumbersome to use. When I started using waterfox they suggested a Mozilla add-on that made the feature more available. Have to go look at it, container something.

That being said, you can explicitly set URLs to sandbox groups, which is pretty handy when you want to keep cookies buy you don’t want them shared necessarily across sites.

Combined with noscript and ublock I have fine grain control of what I allow to run on sites and what cookies I’ll take.

So for sites I regularly visit I have it all preconfigured.

Then I just use a sandbox for random browsing.

Ticks all the boxes for me, without needing separate browsers for “everyday” tasks.