Has anyone who uses Firefox been experiencing some weird behavior in Firefox 26? It started with Firefox 25.

Log (error) entries along the following lines – often repeated over and over again:
14-01-05 10:09:56.611 firefox: invalid context
14-01-05 10:09:56.611 [0x0-0x489489].org.mozilla.firefox: 2014-01-05 10:09:56.610 firefox[13264:9003] invalid context
14-01-05 10:09:56.612 [0x0-0x489489].org.mozilla.firefox: OpenGL version detected: 210

Several browser crashes which seem to be associated with same.
Crash reports forwarded to Mozilla (with no response or apparent resolution of the problem). This never happened prior to Firefox 26.

Sporadic but frequent log-outs (including FTM), 'erasure' of "Remember Me" entries for sign-ins, etc. These are in addition to crashes (where such might be expected).