1.3.3
Version number is now shown in the Documentation tab, under Bugs and feature requests, useful when reporting an issue. Reads the real manifest version automatically, so it never goes stale.
The Charge Type checklist now closes when you click anywhere outside it, no longer requires clicking the toggle button again.
1.3.2
Added a small calendar picker next to the custom Start/End date fields. Click the calendar icon to pick a date from a real month grid instead of typing it, correct leap-year handling included.
This calendar is fully custom-built rather than the browser's native date picker, so it renders correctly in both Chrome and Firefox with no dependency on native picker behavior.
1.3.1
Fixed a Firefox-specific bug where the native date picker for custom date ranges could render behind the popup instead of on top of it, a longstanding unresolved Firefox platform bug, not something fixable with CSS. Replaced with a validated text field as an interim fix, later upgraded to the custom calendar in 1.3.2.
Added real format and calendar validation for custom dates (rejects malformed input and impossible dates like February 30th) with clear, distinct error messages.

1.3.0
Region field can now switch between free-text paste and a pick-from-list checklist (☰ List / ⌨ Type toggle), both stay in sync with the same selection.
Pasting a region's console name (e.g. "US East (N. Virginia)") now resolves automatically to the correct code instead of breaking into fragments.
Fixed a URL encoding issue where spaces were sent as + instead of %20. Both are valid, but only %20 reliably matches what AWS's own generated links use.
1.2.0
Charge type is now a checklist instead of a free-text field, since AWS only has 16 known values. Select any combination, then choose Include or Exclude for the group.
Fixed a bug where several charge types (like "Support fee") would silently fail to filter anything, since the label shown in AWS's console differs from the code AWS actually matches on. The checklist always sends the correct code now.
Documentation tab updated to reflect the new checklist.
1.1.0
Added a "Keep open" button that pops the tool into a separate window that stays open, so switching tabs to copy a value no longer closes your filter progress.
Fixed a layout bug where the popped-out window left dead space below the buttons.
Added a Documentation section explaining why the popup closes on outside clicks and how to avoid it.
Cleaned up remaining innerHTML usage in favor of safer DOM methods