I have never collect unemployment, so I am not sure how it works.

Q) I just have a simple question .I have never collect unemployment,so I am not sure how it works.
What would happen or how should I handle a possible dismissed from my existing work place based on the fact that my current employer is trying to change and force coworkers to stay longer than original closing hours.(I was hired 5 years ago with an availability that I can close til 10:30 pm mon-sat,like two years ago they force us to change our availability to Saturdays till 11pm actually 11:30 but my coworkers and me fight against it so we settle for 11pm Fridays and Saturdays) now they want us to close mon-thur til 11pm and fri-sat til 11:30!I understand I work in a retail store but I find it unnecessary to stay that late when store closes at 10.I have the feeling that if I say no to the new change,they will threaten me to have to let me go.it would be sad specially because this is the first year that as a store we have a bonus but I know they will use the excuse that other departments within the store stay til 11:30 but when I got hired by the store my job was only til 10:30,have nothing to do with other departments because I apply to the specific one that will let me go home earlier.
Please advice what would happen if I get fired for not complying with the new hours change,I would really appreciate

A) I would recommend that you visit your state unemployment benefit website and review their ELIGIBILITY REQUIREMENTS for unemployment benefits. When you quit from your job you may not be eligible for unemployment benefits. In most situations, if you resign voluntarily you are not eligible. However, if you resign for good cause you may be able to collect unemployment benefits. Good cause could include, for example, not being paid, discrimination, unsafe working conditions, a change in your job duties, health and safety risks on the job, or some types of family emergencies.