  We study localized two- and three-dimensional Langmuir solitons in the
framework of model based on generalized nonlinear Schr\"odinger equation that
accounts for local and nonlocal contributions to electron-electron
nonlinearity. General properties of solitons are investigated analytically and
numerically. Evolution of three-dimensional localized wave packets has been
simulated numerically. The additional nonlinearities are shown to be able to
stabilize both azimuthally symmetric two-dimensional and spherically symmetric
three-dimensional Langmuir solitons.
