Proton Pass breaks prowlarr on firefox since today

Prowlarr returns There was an error loading this page when I click on an app and other sites. When I disable proton pass, it works as usual. Any idea how to solve it?
Permission denied to access property "matches"
  at toArray( (webpack://prowlarr/node_modules/focus-lock/dist/es2015/utils/tabUtils.js:8:26)
  at toArray( (webpack://prowlarr/node_modules/focus-lock/dist/es2015/utils/tabUtils.js:7:59)
  at parents.reduce(function (webpack://prowlarr/node_modules/focus-lock/dist/es2015/utils/tabUtils.js:22:64)
  at parents.reduce(function (webpack://prowlarr/node_modules/focus-lock/dist/es2015/utils/tabUtils.js:20:19)
  at getAllTabbableNodes (webpack://prowlarr/node_modules/focus-lock/dist/es2015/utils/DOMutils.js:31:43)
  at getAllTabbableNodes (webpack://prowlarr/node_modules/focus-lock/dist/es2015/focusMerge.js:37:41)
  at setFocus (webpack://prowlarr/node_modules/focus-lock/dist/es2015/setFocus.js:21:34)
  at withinHost (webpack://prowlarr/node_modules/react-focus-lock/dist/es2015/Trap.js:125:23)
  at lastTrap.returnFocus (webpack://prowlarr/node_modules/react-focus-lock/dist/es2015/Trap.js:260:4)
  at reducePropsToState(mountedInstances.map(function (webpack://prowlarr/node_modules/react-clientside-effect/lib/index.es.js:34:6)
  at componentDidUpdate (webpack://prowlarr/node_modules/react-clientside-effect/lib/index.es.js:57:8)
  at Yi (webpack://prowlarr/node_modules/react-dom/cjs/react-dom.production.min.js:219:501)
  at try{for (webpack://prowlarr/node_modules/react-dom/cjs/react-dom.production.min.js:259:159)
  at unstable_next (webpack://prowlarr/node_modules/scheduler/cjs/scheduler.production.min.js:18:342)
  at eg (webpack://prowlarr/node_modules/react-dom/cjs/react-dom.production.min.js:122:324)
  at Uj (webpack://prowlarr/node_modules/react-dom/cjs/react-dom.production.min.js:252:281)
  at Lj (webpack://prowlarr/node_modules/react-dom/cjs/react-dom.production.min.js:243:370)
  at jg (webpack://prowlarr/node_modules/react-dom/cjs/react-dom.production.min.js:123:114)
  at unstable_next (webpack://prowlarr/node_modules/scheduler/cjs/scheduler.production.min.js:18:342)
  at eg (webpack://prowlarr/node_modules/react-dom/cjs/react-dom.production.min.js:122:324)
  at jg (webpack://prowlarr/node_modules/react-dom/cjs/react-dom.production.min.js:123:63)
  at eg (webpack://prowlarr/node_modules/react-dom/cjs/react-dom.production.min.js:122:427)
  at Hb (webpack://prowlarr/node_modules/react-dom/cjs/react-dom.production.min.js:292:100)
  at $c (webpack://prowlarr/node_modules/react-dom/cjs/react-dom.production.min.js:73:354)