stackoverflow/cors-extension at main · javascript-2020/stackoverflow · GitHub

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//  manifest.json - chrome

        {

              "manifest_version"                        : 3,

              "name"                                    : "cors",
              "version"                                 : "1.0.0",

              "icons"                                   : {"48":"asterisk.png"},

              "background"                              : {"service_worker":"extension.js"},

              "permissions"                             : ["declarativeNetRequest"],

              "host_permissions"                        : ["<all_urls>"]

        }


//  manifest.json - firefox

        {

              "manifest_version"                    : 3,

              "name"                                : "cors",
              "version"                             : "1",

              "icons"                               : {"48":"asterisk.png"},

              "permissions"                         : ["declarativeNetRequest"],

              "background"                          : {"scripts":["extension.js"]},

              "action"                              : {"default_icon":"asterisk.png"},

              "host_permissions"                    : ["<all_urls>"]

        }


//  extension.js

          if(typeof browser==='undefined'){
                browser   = chrome;
          }

          browser.runtime.onInstalled.addListener(()=>{

                var rule    = {
                      id: 1,
                      condition: {},
                      action: {
                            type: 'modifyHeaders',
                            responseHeaders: [
                                  {header: 'access-control-allow-origin',operation:'set',value:'*'},
                            ],
                      },
                };

                browser.declarativeNetRequest.updateDynamicRules({addRules:[rule],removeRuleIds:[rule.id]});

          });


https://i.sstatic.net/1K0TZ8a3.png