I solve this by keeping a digital notebook. I have no idea why this is lost on so many people.
Each project gets a new note in Obsidian or OneNote or whatever note taking tool you are using. Each day gets a new #H1 heading with the day. Any relevant URLs get added to the note.
At the end of the day, review your notes and clean them up to be concise. Explain to your future self what you did and why those links are important.
Then close your browser tabs, they are saved in the notes.
If you need the content from the website itself (maybe you are concerned about the site disappearing), use something like Pocket or copy code snippets, text, etc directly into the note. Screenshots help too.