GitHub - attawjy/Firefox-old-addons-collection: 火狐浏览器旧式扩展的收集,兼容于52-56版本,不兼容于57+版本,收集了最普遍的扩展外还有一些个人的选择。This Firefox addons collection is compatible with Firefox 52-56, is not compatible with Firefox 57+ ...
![What are those 3 boxes with 3 numbers in each box upper left corner of browser window and in drop down menus?? | Firefox Support Forum | Mozilla Support What are those 3 boxes with 3 numbers in each box upper left corner of browser window and in drop down menus?? | Firefox Support Forum | Mozilla Support](https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2019-01-14-19-33-08-8edece.png)
What are those 3 boxes with 3 numbers in each box upper left corner of browser window and in drop down menus?? | Firefox Support Forum | Mozilla Support
![issues with certain webpages not loading correctly | Forum d'assistance Firefox | Assistance de Mozilla issues with certain webpages not loading correctly | Forum d'assistance Firefox | Assistance de Mozilla](https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2013-06-15-20-28-52-40f232.png)