Running out of memory whenever trying to draft an email at gmail from Edge

Question

I have been using my antique pc with a bit of stress at times and full of gratefulness at other times, but starting from yesterday, my old pc began stressing me out, and, most importantly, I couldn't fix it just by following a few tutorials on the internet.

Yesterday, when I wanted to draft some emails on Gmail from MS Edge, which I have been using since it is considered the most RAM-friendly, it crashed, and the crash continued no matter how many times I refreshed the page or restarted the pc. It says the error code: Out of memory

Sure enough, opening the task manager tab, I saw that MS Edge was using about 3000000k or 300 Mb, and it also displayed roughly 90% of memory was being used when the Gmail tab is only open and no other activity was going on. For a different person, the result may seem obvious, but my pc has been working somewhat ok, at least it wouldn't crash for just opening a Gmail tab and drafting an email. Therefore, it is not a normal occurrence from my perspective.

Do you know what is the strangest thing? My PC's performance has gotten better; for example, while asking this question, nothing happened, and it is responding extremely quickly as if I am working on the latest laptop haha. Then, what happens when entering Gmail?

Ok, here are a few pictures that may be useful.