Firefox Support Forum

Firefox is my preferred browser, and I have a very comprehensive list of bookmarks with folders and subfolders. Recently, whenever I add a bookmark through 'Manage Bookmarks' to access this list more easily than 'bookmark this page' > 'edit bookmark' & > 'Choose', it works the first time only; after that if I add another the second will not appear. If I close the 'manage bookmarks' window & reopen it & scroll to where I was before (a time consuming exercise), I can see that it did add the bookmark— for some reason it does not show when I do. This happens if the window is idle more than a few moments. Ideas how to fix?

When Firefox switched to esr version. Firefox got not work properly such as youtube and google. These websites says you doesn't have network but I already have. But this problem sometimes happen on Google website.