The goal of this clinical trial is to compare two different modes of delivering a self-management program for chronic pain (independently vs. with additional support) on pain-related disability. Participants with chronic musculoskeletal pain will take part in a 10-week online pain self-management program. For the participants in the group with additional support, the intervention will also include two physiotherapist-led sessions and one group session with other participants. The hypothesis is that the results will support that both modes of delivery could be effective, but the self-management program with additional support will be more effective for reducing pain intensity and pain disability compared to the self-management program alone.