Mass unwatch issues in JIRA from your browser.

jira_mass_unwatch.js

// Unwatch all project issues for current logged in user.
// NOTE: There is a max 50 issue limit. Run multiple times to unwatch more.
// USAGE:
// - update vars below to target specific Project/Issue Status if desired.
// - log on to JIRA board on browser.
// - copy-paste entire code below into browser's dev console and run.
// - check found issues via console and confirm/cancel unwatching to finish.

(()=>{
  const project = '', // (optional) enter the exact project name to limit (e.g.- DC).
        status = '';  // (optional) enter exact target issue status (e.g.- Closed/Complete/Done/Rejected).

  let add_jql = '';
  if(project) add_jql += ' AND project="'+ project +'"';
  if(status)  add_jql += ' AND status="'+ status +'"';
  AJS.$.ajax({
    url: '/rest/api/latest/search',
    data: { jql:'watcher = currentUser()'+ add_jql },
    success: (response)=>{
      console.log('- Found:',response.issues);
      if(confirm('Continue unwatching? '+ (response.total<=50? response.total:50) +' total found. Click cancel to abort.')){
        AJS.$.each(response.issues,(i,issue)=>{
          AJS.$.ajax({
            url: '/rest/api/1.0/issues/'+ issue.id +'/watchers',
            type: 'delete',
            success: ()=>console.log('- Unwatched: '+ issue.key)
          });
        });
      }
    }
  });
})();