I have a question too.

I use Mozilla Firefox and I use its search engine Google browser (not Google's own) to browse the Internet and until recently it always used Google.co.uk (giving me a choice of browsing UK-only (since I'm in the UK) or world-wide). But the other day I read something about google.com and decided to click onto the 'Go to google.com' from the Google.co.uk homepage, and since then it's always used the American .com to search the internet from my browser, not .co.uk. If I want to use google UK I have to specifically go to google.co.uk now. Any idea how to rectify this? I hope this makes sense lol.