While comparisons have been drawn between “Block Everything” and the Yellow Jackets, an analysis by the Jean Jaurès Foundation concluded that the two movements are “profoundly different,” with Wednesday’s plans driven in large part by the radical left.

Wednesday’s campaign, however, is supported by 46 percent of the French, according to a recent survey by pollster Ipsos.

The shutdown campaign began gaining steam after outgoing Prime Minister François Bayrou unveiled his plans to squeeze the 2026 French budget by €43.8 billion in July. | Remon Haazen/Getty Images

Unlike the Yellow Jackets, which began online in opposition to a fuel tax hike before entering the mainstream and bringing the country to a standstill, the goal of the “Block Everything” crusade is far more nebulous. Online accounts claiming to belong to the Sept. 10 movement are calling for a range of things, from an end to political parties to a boycott of the banking system and Macron’s resignation.

Nuñez said the leaderless nature of the movement has fueled concerns about its unpredictability.

“It’s not like a demonstration, there are no organizers, no one we can talk to, just calls to block everything,” said Nuñez. “And more worryingly, the calls have been relayed by radical extreme-left [groups] who are calling for hardcore, sometimes violent acts.”

Authorities also fear that whatever happens on Wednesday will inflame protests next week, which are organized by French trade unions.