Some Firefox 74 users are having problems with websites that require certain types of local storage such as Gmail and Twitter. The sites won't load in regular windows, but will load in private windows because private windows use memory-based storage and don't need to access the disk-based storage files used in regular windows. These users also have failures on the second through fourth tests on this page: https://firefox-storage-test.glitch.me/ '''''If that matches the problem you're having:''''' Past advice related to that diagnostic result was as follows: '''(1) Next Gen Storage Setting''' This setting is normally false (off) but in case it somehow got turned on, see the steps in the following article: [[Some pages or page elements fail to load after updating to Firefox 70]]. ''If that doesn't fix it (after a restart, perhaps):'' '''(2) Have Firefox Generate New Storage Folders''' ''This will cause loss of some data saved locally by websites and add-ons.'' Open your current Firefox settings (AKA Firefox profile) folder using either * "3-bar" menu button > "?" Help > Troubleshooting Information * (menu bar) Help > Troubleshooting Information * type or paste '''about:support''' in the address bar and press Enter In the first table on the page, on the Profile Folder row, click the "Open Folder" button. This should launch a new window listing various files and folders in Windows/File Explorer. Leaving that window open, switch back to Firefox and Exit, either: * "3-bar" menu button > Exit * (menu bar) File > Exit Pause briefly while Firefox finishes its cleanup, then right-click the '''storage''' folder and Rename to something like '''storageOLD''' -- the purpose of renaming instead of deleting is the possibility of reinstating the old folder or mining it for essential data. Start Firefox back up again. Do sites work again?