If you are viewing a document with no scrollbar, and then open one with a scrollbar, it causes a reflow of the document that makes the document flicker, and whatnot. On the other hand, Internet Explorer shows a disabled scrollbar. I think doing it that way would be more appropriate.
I never noticed any flicker. But permanent scrollbar(s) would be extremely annoying for me as a user and would also conflict with explicit web-design in many cases. So to the extent there's a reflow, I wouldn't call it unecessary. This is basically a duplcate however: Bug 179692.
I sifted through a few comments and it doesn't appear as a duplicate. This bug is about having the vertical scrollbars always visible like in IE 6, and disabled but still visible if scrolling is not possible (i.e. a short page like google.com)
*** This bug has been marked as a duplicate of 72540 ***
Status: NEW → RESOLVED
Last Resolved: 15 years ago
Resolution: --- → DUPLICATE
Status: RESOLVED → VERIFIED
rkaa: bug 179692 is about windows opened by scripts, and says scrollbars=no should be ignored when the content is long enough to require scrollbars. It is not the same as this bug.
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