Deleting 320 screens-full of history "Older than 6 months". Crashes.
Firefox 30.0
Do: History > Show All History > Older than 6 months
About 320 screen-fulls of old history.
Start: Select the delete starting line. It turns blue. Do 20 times: Shift + Page Down Selecting 20 History screen. Select more: crashes. Right-click in the blue selection. Select: Delete this page Wait about 40 seconds. When the screen "jumps", left-click in the blue selected region. Wait about 30 seconds for "blue" to clear. Done: 1min 46 sec. Repeat for next 20 screen pages. About 16 times. Eventually all done.
Can not select / delete all old screens at once. Too many. Fix needed??
Wšykne wótegrona (2)
I do this regularly with pages from this forum (Search: support.mozilla.org) if there are a few thousand visited pages. I start at the bottom (End key) and use Shift+PageUp and stop at about 1000 selected items and press the Delete key to remove the selected. Then I continue with the next set until I'm left with only pages from the last few days.
Thanks for the good bottom-up idea. My goal was to inspire someone to revise the delete History features code so it could remove many more History lines in each pass. Like perhaps 10,000? There have been 30 Firefox revisions. Maybe fixed in 31?