which toolbar? please you must give us more info than that, when you don't we just waste time guessing. What toolbar? what browser? what version of windows? What else is changed etc did you hit F11 by mistake and the whole area at the top of your browser is gone if so just hit F11 again that toggles full screen on and off.

that does come as an addon so go into the area where you have addons listed and try removing it from there. I don't use chrome, but in firefox it is under tools>addons. Do you know when you installed it if it was recent your best bet with this stubborn thing might be to do a simple system restore to the day before you installed it. any time you ask for help please tell us which version of windows you are using and the versions of the browsers since those will require different instructions. If you need instructions for doing a system restore we need to know your windows version. I would also run an updated malwarebytes free scan because that thing is often associated with malware. Malwarebytes' Anti-Malware (Win) - Detecting and Removing Malware and superantispyware SUPERAntiSpyware. as I said this thing is notorious for linking with known malware, this is one statement I found "We found that the software has certain suspicious behavior such as downloading malicious codes, installing toolbar with users� acknowledgement as well as changing homepage." Running malwarebytes and superantispyware should take care of it but if not let us know.

If it is Sea Monkey browser, look up in the upper left corner ,and to the left of the Back arrow, File and Home buttons, are these little areas that have a downward pointing arrow head and a couple of rows of dots. Click on one of those to expand the tool bar. several times I have done that and closed my tool bars with out meaning to and have to click those areas to expand them.

Are you referring to the dock? The toolbar is the menu @ the top of the screen - the dock is the thing w/ icons.The dock preferences in the Apple menu should enable you to configure that. Did you try clicking the little apple @ the top left of your screen? Yosemite is so new, I imagine it has a number of bugs that will be revealed as more folks start converting to it. Have you checked the Apple.com support pages & looked to see if there any discussion of this on the boards there? If not, you can post a message & hopefully get answers there. You can also try clicking 'Help' in the toolbar & searching there.... Here is a link that might be useful: Apple.com community support - Yosemite