Why does find/search ( command F ) frequently start by accident when I start typing?

Well, in numerous apps or programs. For example, this page right now, open in Firefox, I just hold down command, then tap f, and a search bar opens at the bottom of the screen. Then if I type in letter F or the word firefox, every letter f on this page or every word firefox will be highlighted. Same thing in other apps like textEdit, I think it might work in most any app or window, I use it all the time, very handy for finding some word. I just can't figure out how I am doing that by accident, since I have to hold down command and then click F. But it happens several times per day, I start out doing something like typing to respond to your post, and suddenly I am typing in the Find bar. Weird. Thx for the response!

I would say it primarily happens in Firefox, as that is the app in which I am most likey to be typing a response. Within Firefox, probably most often(totally?) in Facebook

Yep, that would make more sense, seeing how command and space are so close together. But nope, that is a totally different bar/window, it appears in the upper part of my screen, while the irritating find bar is appearing at the very bottom of my screen. Which is normal and fine when I want it to happen. I just can't figure out how it is happening by accident while I am typing. Even with spotlight, I still have to hold down command, though I have been able to make it happen if I try hard to press both command and space at the same time. But the command and F are kind of far apart to be hitting them both at the same time by accident. Apparently, this is not a common problem. Leave it to me! Thx for the response!

Bill

Thanks, I gave that a try. under sys pref/keyboard/shortcuts/app shortcuts/all applications I copied "Find…" into the title and gave it the combo option-command-F. But now that just command seems to just open a google search in my Firefox browser, while the old command-F still opens the same search window bottom left in the browser, the one which I so often open by accident. Seems to me I what I need to try is to change the command-F shortcut to have some other modifier in there such as the one I just added, option-command-F. But I can not find this shortcut anywhere in order to attempt to alter it. You would think it would be under the keyboard shortcuts but no sign of it or anywhere else.