Added

FEATURE_NO_TABS in src/config.h to allow the user to compile vimb without
tab support - which is useful in when the tabs are handles by the
windowmanager
Native tab support within a single window. New normal mode commands:
- gt - go to next tab
- gT - go to previous tab
- g0 - go to first tab
- g$ - go to last tab
New ex commands for tab management:
- :tabclose - close current tab
- :tabnext - switch to next tab
- :tabprev / :tabprevious - switch to previous tab
- :tabfirst - switch to first tab
- :tablast - switch to last tab
New :quitall (:quita) command to close all tabs and quit the browser.
Supports ! bang to force quit even with running downloads.
Setting media to enable/disable all media support. Useful on systems where
GStreamer is not fully configured or to prevent crashes from missing plugins.

Changed

Migrated from GTK3 to GTK4
Migrated from WebKitGTK 4.1 to WebKitGTK 6.0
Replaced D-Bus IPC by WebKit provided IPC (WebKitUserMessage)
Replaced deprecated GtkListStore/GtkTreeView completion with
GListStore/GtkListView for GTK4 compatibility
:tabopen now opens in a new tab instead of a new window
gH, U, P commands now open in a new tab instead of a new window
;t and ;I hint modes now open in a new tab instead of a new window
Ctrl-Click and Middle-Click now open links in a new tab instead of a new window
Applied smooth scrolling to all scroll commands too - thanks to Doxnit

Fixed memory leaks in various functions:
- util_build_path() - leaked result from g_get_current_dir()
- vb_register_add() - leaked result from g_strjoin()
- shortcut_free() - leaked sc->fallback string
- map_delete() - leaked lhs string from convert_keys()
- vimb_setup() - leaked results from util_get_data_dir() and util_get_cache_dir()
- hint_function_check_result() - leaked value string from g_variant_get()
- input_open_editor() - leaked text and id strings from g_variant_get()
- Client cleanup functions - leaked hit_test_result, uri, and title
Fixed JavaScript error "Can't find variable: vimb_input_mode_element" when
pressing i in normal mode before entering input mode
Fixed deprecated webkit_web_page_get_main_frame() usage in webextension by
using WebKitScriptWorld "window-object-cleared" signal to cache frame references

Removed X-Embed support as this is not supported by GTK4
Following settings were removed from the man page documentation as they are
deprecated and removed in WebKitGTK 6.0.

accelerated-2d-canvas (bool) enable-accelerated-2d-canvas deprecated in WebKitGTK 6.0
dns-prefetching (bool) enable-dns-prefetching deprecated and does nothing
frame-flattening (bool) enable-frame-flattening deprecated in WebKitGTK 6.0
hyperlink-auditing (bool) enable-hyperlink-auditing deprecated and does nothing
offline-cache (bool) enable-offline-web-application-cache deprecated and does nothing
plugins (bool) enable-plugins deprecated and removed in WebKitGTK 6.0
xss-auditor (bool) enable-xss-auditor deprecated and removed in WebKitGTK 6.0