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+To enable debugging use the configure option --enable-debug.
+
+LOGGING
+=======
+
+At execution time, you must enable the log service. To enable the
+log service, set the environment variable: EPHY_LOG_MODULES
+variable.
+
+EPHY_LOG_MODULES variable has the form:
+
+	<moduleName>[:<moduleName>]*
+
+moduleName is a filename.
+ex: export EPHY_LOG_MODULES=ephy-window.c:ephy-autocompletion.c
+The special log module "all" enables all log modules.
+
+Use the LOG macro to put debug messages in the code.
+
+PROFILING
+=========
+
+At execution time, you must enable the profiling service. To enable the
+profiling service, set the environment variable: EPHY_PROFILING_MODULES
+variable.
+
+EPHY_PROFILE_MODULES variable has the form:
+
+	<moduleName>[:<moduleName>]*
+
+moduleName is a filename.
+ex: export EPHY_PROFILE_MODULES=ephy-window.c:ephy-autocompletion.c
+The special profiling module "all" enables all profiling modules.
+
+Use START_PROFILER STOP_PROFILER macros to profile pieces of code.