When an entry it marked, there is a choice to add it to the checker.

Thank you FredMcD.

If you add "tooltip" to the personal dictionary, "Tooltip" and "tooltips" are marked in red.

If, however, you add "tooltip/S" to en-US.dic, "Tooltip" and "tooltips" are evaluated as correct.

How can I achieve that with the personal dictionary?

The personal dictionary file persdict.dat file only stores words that are allowed and doesn't support meta data like built-in and installed dictionaries. You nee to add all modifications separately to make Firefox recognize them.

Bug 338291 - Words added to the personal dictionary are not suggested for misspelled words

Thank you cor-el. I appreciate it.

If you want "i" to be marked in red, and have "I" as a suggestion - remove "i/US" from en-US.dic and add "I" instead.

Where can I read about the meta data parameters (/S /M etc.)?

Regards.

You're welcome

You can look at hunspell4.pdf:

• http://sourceforge.net/projects/hunspell/files/Hunspell/Documentation/

hunspell1.pdf = Hunspell from the command line hunspell3.pdf = API details hunspell4.pdf = How to define spell checking using Hunspell

See also hunspell-1.3.3.tar.gz/hunspell-1.3.3/man hunspell.5

• http://sourceforge.net/projects/hunspell/files/Hunspell/

Bug 1022262 - (hunspell-1.3.3) Upgrade to Hunspell 1.3.3 (fx33)

Thanks again. I appreciate your kind help.

Correction: If you want "i" to be marked in red, and have "I" as a suggestion - remove "i/US" from en-US.dic. No need to add anything.

Another correction: if you remove "i/US" from en-US.dic, you have to add "is" and "i.e." is marked in red even if explicitly added.