Same here. I use M1 Mac Mini and Xcode was running fine a week ago. Now it's dead. I can't open any project. It quits immediately with (tabController) should not be nil.. I reported this to Apple. This is ridiculous. Now I'm reinstalling it, maybe this will help. It didn't. Process:&#9;&#9;&#9;&#9;&#9;&#9;&#9; Xcode [11611] Path:&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;&#9;/Applications/Xcode.app/Contents/MacOS/Xcode Identifier:&#9;&#9;&#9;&#9;&#9;&#9;com.apple.dt.Xcode Version:&#9;&#9;&#9;&#9;&#9;&#9;&#9; 12.3 (17715) Build Info:&#9;&#9;&#9;&#9;&#9;&#9;IDEFrameworks-17715000000000000~8 (12C33) ... Code Type:&#9;&#9;&#9;&#9;&#9;&#9; ARM-64 (Native) Parent Process:&#9;&#9;&#9;&#9;??? [1] Responsible:&#9;&#9;&#9;&#9;&#9; Xcode [11611] Date/Time:&#9;&#9;&#9;&#9;&#9;&#9; 2020-12-30 13:04:12.813 +0100 OS Version:&#9;&#9;&#9;&#9;&#9;&#9;macOS 11.1 (20C69) Report Version:&#9;&#9;&#9;&#9;12 Anonymous UUID:&#9;&#9;&#9;&#9;... Time Awake Since Boot: 20000 seconds System Integrity Protection: enabled Crashed Thread:&#9;&#9;&#9;&#9;0&#9;Dispatch queue: com.apple.main-thread Exception Type:&#9;&#9;&#9;&#9;EXC_CRASH (SIGABRT) Exception Codes:&#9;&#9;&#9; 0x0000000000000000, 0x0000000000000000 Exception Note:&#9;&#9;&#9;&#9;EXC_CORPSE_NOTIFY Application Specific Information: ProductBuildVersion: 12C33 ASSERTION FAILURE in /Library/Caches/com.apple.xbs/Sources/IDEFrameworks/IDEFrameworks-17715/IDEKit/Workspace/IDEWorkspaceDocument.m:3270 Details:&#9;(tabController) should not be nil. Object:&#9; <IDEWorkspaceDocument: 0x117aca270> Method:&#9; -commitStateToDictionary: Thread:&#9; <NSThread: 0x14c628fe0>{number = 1, name = main} Open FDs: 34/7168

I managed to get Xcode working, finally. What I did was: Reinstalled Xcode and restarted mac. Opened some other xcode-related file (a sample from the Internet) It crashed. I clicked "Reopen" and before it crashed again I went to File > Open Recent > Clear menu. For whatever reason, it didn't crash so I was able to select my project and now it works fine... Atom editor, full of plugins, a few years ago on old Ubuntu was more stable than this.

Same here. We have listeners in the content script. In Chrome, when I set a new entry in the background page, the content script logs the change. In Safari, it doesn't work.

I also would like to know how to trigger this prompt. I had installed Grammarly and right after that, it prompted me to grant permissions to 600+ hosts... How can I trigger a similar permissions "bar"?

Update: @bramiam Not sure, but have you tried with a real device? In the simulator, my extension doesn't ask about additional permissions, but I tried it on the real device and it requested permissions... From my manifest: "content_scripts": [{     "run_at": "document_idle",     "all_frames": true,     "match_about_blank": true,     "js": [ "xxx.js" ],     "css": [ "xxx.css" ],     "matches": [ "<all_urls>" ]   },{     "js": [ "xxx.js" ],     "matches": [ "<all_urls>" ] }], "permissions": [     "tabs",     "cookies",     "storage",     "https://xxxxxxx.com",     "http://*/*",     "https://*/*" ],