After defeating Marie-Eve Dicaire in Manchester, the unified champion was able to add the IBF title to her belt.
She unified the division in September after winning her first world title.
She capped a great year by winning her third world title in nine months.
Canada's Dicaire was defeated for the second time in her professional career.
The judges gave the fight a score of 100-90, 98-94, and 97-93.
"It was very difficult, I knew it was going to be difficult," he said.
This has been my best year in boxing and I almost walked away from the sport.
A year ago, I was unified champion with three belts and a magazine belt.
Since turning professional, Great Britain's first female Olympic boxer has won 13 fights, with two losses and one draw, while Dicaire has only won one fight.
After suffering her first professional defeat in August of last year, it seems like it's hard to believe that she had to stop thinking about ending her career.
She says that a year ago she didn't know how she would become a world champion.
She realised her dream in February when she knocked out Chris Namus and then unified the division in September.
The opportunity to headline at a major venue for the first time as a professional and provide the latest spectacle in a thrilling period for women's boxing was the reward for that.
After receiving a rousing reception at Manchester's AO Arena, she immediately responded by landing two shots in the first round.
Dicaire sometimes tried to throw the Britons off her game by opting for a more agricultural approach, but she was still able to land the more accurate punches.
Although the Canadian tried to push the pace in the third, she walked onto a couple of solid lefts from her opponent.
The Canadian might have gotten the better of it after the pair traded blows in the fifth round.
In the sixth, he started to throw combinations and landed a right hook.
Several body shots in the seventh kept Jonas on top and while Dicaire kept coming forward, Jonas continued to pick her off to end an unforgettable year on a high.
After a busy year, he could be forgiven for talking more about taking a break.
Setting the record straight could be on her list of new year's resolutions.
In 2020 she shared a controversial draw with her fellow Brit at super-featherweight, and in September she became the new light-middleweight champion.
"I've had a tough year, I'm going to have a holiday and then we'll discuss the best options in the year to come."
I did that tonight to keep my options open.
ChantelleCameron became the UK's first undisputed female champion with her win over Jessica McCaskill.
After the close points loss to the undisputed lightweight champion at Manchester's AO Arena, there would be an appeal for a second match.
There is also the 'GWOAT', the American female boxer.
Shields said after her win over Marshall that she would be open to fighting in the UK or the US at light-middleweight, where she was previously undisputed champion.
A fight with Shields in 2023 is a definite possibility according to the promoter.
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