Protesters gathered in the French city of Bordeaux to show their opposition to a new security bill.
The legislation would make it illegal to share images of police officers for "malicious purposes".
Media unions say it could allow police to prevent journalists from doing their work and potentially documenting abuses.
It was given the green light by French MPs on Tuesday.
The bill is expected to go before the country's upper house in January, and must also receive a referral from the country's constitutional council before it comes into effect.
More No Comment
50 couples get married in mass wedding ceremony in Brazil
No comment videos of the week
Residents inspect damage after huge fire in Manila
Ukrainian woman, 3 children survive house bombing
"Russian Hulk" sets world record by pulling three helicopters
37 years after massacre, families receive remains
An honorary Palme d'Or for Tom Cruise at the Cannes Film Festival
Feminist groups protest against femicides in Mexico
Ukrainian soldiers blow up bridge in Luhansk region
An American activist has been carrying his rubbish for a month.
Mass arrests in Armenia during anti-government protests
Middle school student in Afghanistan makes model vehicles from waste
Jewish pilgrimage begins at the Ghriba synagogue in Tunisia
Aussie PM crashes into child during football match on campaign trail
Football fans swarm to sunny Seville ahead of Europa League final